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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2016
Income Tax Disclosure [Abstract] |
Income before income taxes by geographic area | Income/(loss) before income taxes by geographic area was as follows:
|  | Year Ended December 31,
|  | 2016 |  | 2015 |  | 2014
|  | (In thousands)
Domestic |  | $ | 222,178 |  |  | $ | 231,798 |  |  | $ | 174,964 |
Foreign |  | 5,193 |  |  | (49,627 | ) |  | (10,564 | )
Total income before income taxes |  | $ | 227,371 |  |  | $ | 182,171 |  |  | $ | 164,400 |
Federal, state and foreign income taxes | Federal, state and foreign income tax provisions/(benefits) were as follows:
|  | Year Ended December 31,
|  | 2016 |  | 2015 |  | 2014
|  | (In thousands)
Federal: |  |  |  |  |  |
Current |  | $ | 57,321 |  |  | $ | 66,973 |  |  | $ | 49,590 |
Deferred |  | 18,704 |  |  | 15,528 |  |  | 22,549 |
State: |  |  |  |  |  |
Current |  | 4,636 |  |  | 5,165 |  |  | 4,849 |
Deferred |  | 1,878 |  |  | 1,768 |  |  | 727 |
Foreign: |  |  |  |  |  |
Current |  | 4,187 |  |  | 4,150 |  |  | 4,638 |
Deferred |  | (6,420 | ) |  | (5,412 | ) |  | (10,957 | )
Provision for income taxes |  | $ | 80,306 |  |  | $ | 88,172 |  |  | $ | 71,396 |
Difference between the income tax computation by the company and the statutory body | Actual income tax expense differed from income tax expense computed by applying the U.S. federal statutory corporate tax rate of 35% to income before income taxes in 2016, 2015 and 2014 as follows:
|  | Year Ended December 31,
|  | 2016 |  | 2015 |  | 2014
|  | (In thousands)
Provision at the U.S. federal statutory rate |  | $ | 79,580 |  |  | $ | 63,760 |  |  | $ | 57,540 |
Increase (decrease) resulting from: |  |  |  |  |  |
State income tax, net of benefit for federal deduction |  | 4,230 |  |  | 4,448 |  |  | 5,267 |
Foreign income tax rate differential |  | (2,799 | ) |  | (2,002 | ) |  | (3,188 | )
Employment credits |  | (821 | ) |  | (407 | ) |  | (481 | )
Changes in valuation allowances |  | 749 |  |  | 14,667 |  |  | 9,507 |
Non-deductible goodwill |  | 34 |  |  | 4,651 |  |  | — |
Deductible goodwill |  | — |  |  | — |  |  | (10,209 | )
Stock-based compensation |  | 368 |  |  | 386 |  |  | 245 |
Convertible debt redemption |  | — |  |  | — |  |  | 9,727 |
Other |  | (1,035 | ) |  | 2,669 |  |  | 2,988 |
Provision for income taxes |  | $ | 80,306 |  |  | $ | 88,172 |  |  | $ | 71,396 |
Schedule of Deferred Tax Assets and Liabilities [Table Text Block] | The tax effects of these temporary differences representing deferred tax assets/liabilities resulted principally from the following:
|  | December 31,
|  | 2016 |  | 2015
|  | (In thousands)
Deferred tax assets: |  |  |  |
Loss reserves and accruals |  | $ | 59,884 |  |  | $ | 53,747 |
Interest rate swaps |  | 5,598 |  |  | 11,671 |
Goodwill and intangible franchise rights |  | 5,907 |  |  | 7,621 |
U.S. state net operating loss (“NOL”) carryforwards |  | 16,848 |  |  | 17,413 |
Depreciation expense |  | 775 |  |  | — |
Foreign NOL carryforwards |  | 34,946 |  |  | 20,408 |
Deferred tax assets |  | 123,958 |  |  | 110,860 |
Valuation allowance on deferred tax assets |  | (53,946 | ) |  | (46,547 | )
Net deferred tax assets |  | $ | 70,012 |  |  | $ | 64,313 |
Deferred tax liabilities: |  |  |  |
Goodwill and intangible franchise rights |  | $ | (160,439 | ) |  | $ | (143,509 | )
Depreciation expense |  | (64,465 | ) |  | (53,619 | )
Deferred gain on bond redemption |  | (1,023 | ) |  | (1,535 | )
Other |  | (3,317 | ) |  | (1,060 | )
Deferred tax liabilities |  | (229,244 | ) |  | (199,723 | )
Net deferred tax liability |  | $ | (159,232 | ) |  | $ | (135,410 | )

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