001 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) link:presentationLink link:definitionLink link:calculationLink 002 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) link:presentationLink link:definitionLink link:calculationLink 003 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parentheticals) link:presentationLink link:definitionLink link:calculationLink 004 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) link:presentationLink link:definitionLink link:calculationLink 005 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (Parentheticals) link:presentationLink link:definitionLink link:calculationLink 006 - Statement - CONSOLIDATED STATEMENTS OF CAPITAL STOCK AND LONG-TERM DEBT (Unaudited) link:presentationLink link:definitionLink link:calculationLink 007 - Statement - CONSOLIDATED STATEMENTS OF CAPITAL STOCK AND LONG-TERM DEBT (Unaudited) (Parentheticals) link:presentationLink link:definitionLink link:calculationLink 008 - Statement - CONSOLIDATED STATEMENTS OF COMMON STOCKHOLDERS' EQUITY (Unaudited) link:presentationLink link:definitionLink link:calculationLink 009 - Statement - CONSOLIDATED STATEMENTS OF COMMON STOCKHOLDERS' EQUITY (Unaudited) (Parentheticals) link:presentationLink link:definitionLink link:calculationLink 010 - Disclosure - Basis of Presentation and Recent Developments link:presentationLink link:definitionLink link:calculationLink 011 - Disclosure - Rate and Regulatory Matters link:presentationLink link:definitionLink link:calculationLink 012 - Disclosure - Capitalization link:presentationLink link:definitionLink link:calculationLink 013 - Disclosure - Earnings Per Share link:presentationLink link:definitionLink link:calculationLink 014 - Disclosure - Business Segment Data link:presentationLink link:definitionLink link:calculationLink 015 - Disclosure - Short-Term Borrowings link:presentationLink link:definitionLink link:calculationLink 016 - Disclosure - Commitments and Contingent Liabilities link:presentationLink link:definitionLink link:calculationLink 017 - Disclosure - Employee Benefit Plans link:presentationLink link:definitionLink link:calculationLink 018 - Disclosure - Revenue Recognition from Contracts with Customers link:presentationLink link:definitionLink link:calculationLink 019 - Disclosure - Accounting Policies, by Policy (Policies) link:presentationLink link:definitionLink link:calculationLink 020 - Disclosure - Capitalization (Tables) link:presentationLink link:definitionLink link:calculationLink 021 - Disclosure - Earnings Per Share (Tables) link:presentationLink link:definitionLink link:calculationLink 022 - Disclosure - Business Segment Data (Tables) link:presentationLink link:definitionLink link:calculationLink 023 - Disclosure - Short-Term Borrowings (Tables) link:presentationLink link:definitionLink link:calculationLink 024 - Disclosure - Commitments and Contingent Liabilities (Tables) link:presentationLink link:definitionLink link:calculationLink 025 - Disclosure - Employee Benefit Plans (Tables) link:presentationLink link:definitionLink link:calculationLink 026 - Disclosure - Revenue Recognition from Contracts with Customers (Tables) link:presentationLink link:definitionLink link:calculationLink 027 - Disclosure - Rate and Regulatory Matters (Details) link:presentationLink link:definitionLink link:calculationLink 028 - Disclosure - Capitalization (Details) link:presentationLink link:definitionLink link:calculationLink 029 - Disclosure - Capitalization (Details) - Schedule of carrying amount and fair value of the bonds link:presentationLink link:definitionLink link:calculationLink 030 - Disclosure - Earnings Per Share (Details) link:presentationLink link:definitionLink link:calculationLink 031 - Disclosure - Earnings Per Share (Details) - Schedule of earnings per share link:presentationLink link:definitionLink link:calculationLink 032 - Disclosure - Earnings Per Share (Details) - Schedule of earnings per share (Parentheticals) link:presentationLink link:definitionLink link:calculationLink 033 - Disclosure - Business Segment Data (Details) link:presentationLink link:definitionLink link:calculationLink 034 - Disclosure - Business Segment Data (Details) - Schedule of segment reporting information, by segment link:presentationLink link:definitionLink link:calculationLink 035 - Disclosure - Short-Term Borrowings (Details) link:presentationLink link:definitionLink link:calculationLink 036 - Disclosure - Short-Term Borrowings (Details) - Schedule of lines of credit link:presentationLink link:definitionLink link:calculationLink 037 - Disclosure - Short-Term Borrowings (Details) - Schedule of information regarding short-term borrowings link:presentationLink link:definitionLink link:calculationLink 038 - Disclosure - Commitments and Contingent Liabilities (Details) link:presentationLink link:definitionLink link:calculationLink 039 - Disclosure - Commitments and Contingent Liabilities (Details) - Schedule of purchased water costs link:presentationLink link:definitionLink link:calculationLink 040 - Disclosure - Commitments and Contingent Liabilities (Details) - Schedule of operating lease ROU assets link:presentationLink link:definitionLink link:calculationLink 041 - Disclosure - Commitments and Contingent Liabilities (Details) - Schedule of future minimum operating lease commitments link:presentationLink link:definitionLink link:calculationLink 042 - Disclosure - Employee Benefit Plans (Details) link:presentationLink link:definitionLink link:calculationLink 043 - Disclosure - Employee Benefit Plans (Details) - Schedule of components of net benefit cost link:presentationLink link:definitionLink link:calculationLink 044 - Disclosure - Revenue Recognition from Contracts with Customers (Details) - Schedule of operating revenue link:presentationLink link:definitionLink link:calculationLink 000 - Document - Document And Entity Information link:presentationLink link:definitionLink link:calculationLink