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Schedule I - Condensed Financial Information of Parent Company (Tables) | 12 Months Ended
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Dec. 31, 2014
Condensed Financial Information of Parent Company Only Disclosure [Abstract] |
Condensed Income Statement |
| Year ended December 31,
| 2014 |  | 2013 |  | 2012
| (In thousands)
Operating Revenues | $ | — |  |  | $ | — |  |  | $ | — |
Operating Expenses | 650 |  |  | 941 |  |  | 3,287 |
Operating income (loss) | (650 | ) |  | (941 | ) |  | (3,287 | )
Other Income and Deductions: |  |  |  |  |
Equity in earnings of subsidiaries | 124,543 |  |  | 116,634 |  |  | 117,900 |
Other income | 622 |  |  | 769 |  |  | 670 |
Other deductions | (13,650 | ) |  | (22,825 | ) |  | (20,904 | )
Net other income (deductions) | 111,515 |  |  | 94,578 |  |  | 97,666 |
Earnings Before Income Taxes | 110,865 |  |  | 93,637 |  |  | 94,379 |
Income Tax Expense (Benefit) | (5,389 | ) |  | (6,870 | ) |  | (11,168 | )
Net Earnings | $ | 116,254 |  |  | $ | 100,507 |  |  | $ | 105,547 |
Condensed Cash Flow Statement |
| Year Ended December 31,
| 2014 |  | 2013 |  | 2012
| (In thousands)
Cash Flows From Operating Activities: |  |  |  |  |
Net earnings | $ | 116,254 |  |  | $ | 100,507 |  |  | $ | 105,547 |
Adjustments to reconcile net earnings to net cash flows from operating activities: |  |  |  |  |
Depreciation and amortization | 680 |  |  | 4,192 |  |  | 5,000 |
Deferred income tax expense | (69,442 | ) |  | (51,820 | ) |  | (46,632 | )
Equity in (earnings) of subsidiaries | (124,543 | ) |  | (116,634 | ) |  | (117,900 | )
Loss on reacquired debt | — |  |  | 3,253 |  |  | — |
Stock based compensation expense | 5,931 |  |  | 5,320 |  |  | 3,585 |
Changes in certain assets and liabilities: |  |  |  |  |
Other current assets | 22,955 |  |  | 28,460 |  |  | (43,638 | )
Other assets | 51,644 |  |  | 46,558 |  |  | 34,096 |
Accounts payable | (88 | ) |  | 620 |  |  | 8 |
Accrued interest and taxes | (7,683 | ) |  | (9,266 | ) |  | (28,855 | )
Other current liabilities | (1,668 | ) |  | (146 | ) |  | 3,876 |
Other liabilities | 28,704 |  |  | (27,756 | ) |  | (29,601 | )
Net cash flows from operating activities | 22,744 |  |  | (16,712 | ) |  | (114,514 | )
Cash Flows From Investing Activities: |  |  |  |  |
Utility plant additions | (474 | ) |  | (960 | ) |  | (7,524 | )
Investments in subsidiaries | — |  |  | (13,800 | ) |  | — |
Cash dividends from subsidiaries | 46,599 |  |  | 158,772 |  |  | 61,406 |
Net cash flows from investing activities | 46,125 |  |  | 144,012 |  |  | 53,882 |
Cash Flows From Financing Activities: |  |  |  |  |
Short-term borrowings (repayments), net | 600 |  |  | (37,600 | ) |  | 120,900 |
Repayment of long-term debt | — |  |  | (29,468 | ) |  | (2,387 | )
Proceeds from stock option exercise | 6,999 |  |  | 4,618 |  |  | 11,684 |
Purchases to satisfy awards of common stock | (17,319 | ) |  | (13,807 | ) |  | (25,168 | )
Dividends paid | (58,940 | ) |  | (50,980 | ) |  | (44,609 | )
Other, net | 81 |  |  | — |  |  | — |
Net cash flows from financing activities | (68,579 | ) |  | (127,237 | ) |  | 60,420 |
Change in Cash and Cash Equivalents | 290 |  |  | 63 |  |  | (212 | )
Cash and Cash Equivalents at Beginning of Period | 92 |  |  | 29 |  |  | 241 |
Cash and Cash Equivalents at End of Period | $ | 382 |  |  | $ | 92 |  |  | $ | 29 |
Supplemental Cash Flow Disclosures: |  |  |  |  |
Interest paid | $ | 12,152 |  |  | $ | 14,510 |  |  | $ | 15,007 |
Income taxes paid (refunded), net | $ | (2,014 | ) |  | $ | 22,378 |  |  | $ | 1,501 |
Condensed Balance Sheet |
| December 31,
| 2014 |  | 2013
| (In thousands)
Assets |  |  |
Cash and cash equivalents | $ | 382 |  |  | $ | 92 |
Intercompany receivables | 107,619 |  |  | 136,387 |
Income taxes receivable | 29 |  |  | 14,989 |
Other, net | 8,115 |  |  | 8,544 |
Total current assets | 116,145 |  |  | 160,012 |
Property, plant and equipment, net of accumulated depreciation of $10,251 and $9,167 | 27,076 |  |  | 26,601 |
Investment in subsidiaries | 1,757,650 |  |  | 1,683,321 |
Other long-term assets | 70,939 |  |  | 53,892 |
Total long-term assets | 1,855,665 |  |  | 1,763,814 |
| $ | 1,971,810 |  |  | $ | 1,923,826 |
Liabilities and Stockholders’ Equity |  |  |
Short-term debt | $ | 100,600 |  |  | $ | 100,000 |
Short-term debt-affiliate | 8,819 |  |  | 8,819 |
Current maturities of long-term debt | 118,766 |  |  | — |
Accrued interest and taxes | 2,816 |  |  | 2,797 |
Other current liabilities | 16,320 |  |  | 16,876 |
Total current liabilities | 247,321 |  |  | 128,492 |
Long-term debt | — |  |  | 118,766 |
Other long-term liabilities | 2,943 |  |  | 2,999 |
Total liabilities | 250,264 |  |  | 250,257 |
Common stock (no par value; 120,000,000 shares authorized; issued and outstanding 79,653,624 shares) | 1,173,845 |  |  | 1,178,369 |
Accumulated other comprehensive income (loss), net of tax | (61,755 | ) |  | (58,140 | )
Retained earnings | 609,456 |  |  | 553,340 |
Total common stockholders’ equity | 1,721,546 |  |  | 1,673,569 |
| $ | 1,971,810 |  |  | $ | 1,923,826 |
See Notes 6, 7, 14, and 16 for information regarding commitments, contingencies, and maturities of long-term debt.

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