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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2017
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,
|  | 2017 |  | 2016 |  | 2015
|  | (In thousands)
Domestic |  | $ | 206,579 |  |  | $ | 222,178 |  |  | $ | 231,798 |
Foreign |  | 12,424 |  |  | 5,193 |  |  | (49,627 | )
Total income before income taxes |  | $ | 219,003 |  |  | $ | 227,371 |  |  | $ | 182,171 |
Federal, state and foreign income taxes | Federal, state and foreign income tax provisions/(benefits) were as follows:
|  | Year Ended December 31,
|  | 2017 |  | 2016 |  | 2015
|  | (In thousands)
Federal: |  |  |  |  |  |
Current |  | $ | 44,921 |  |  | $ | 57,321 |  |  | $ | 66,973 |
Deferred |  | (46,938 | ) |  | 18,704 |  |  | 15,528 |
State: |  |  |  |  |  |
Current |  | 3,774 |  |  | 4,636 |  |  | 5,165 |
Deferred |  | 3,921 |  |  | 1,878 |  |  | 1,768 |
Foreign: |  |  |  |  |  |
Current |  | 2,929 |  |  | 4,187 |  |  | 4,150 |
Deferred |  | (3,046 | ) |  | (6,420 | ) |  | (5,412 | )
Provision for income taxes |  | $ | 5,561 |  |  | $ | 80,306 |  |  | $ | 88,172 |
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 2017, 2016 and 2015 as follows:
|  | Year Ended December 31,
|  | 2017 |  | 2016 |  | 2015
|  | (In thousands)
Provision at the U.S. federal statutory rate |  | $ | 76,651 |  |  | $ | 79,580 |  |  | $ | 63,760 |
Increase (decrease) resulting from: |  |  |  |  |  |
State income tax, net of benefit for federal deduction |  | 4,472 |  |  | 4,230 |  |  | 4,448 |
Foreign income tax rate differential |  | (2,443 | ) |  | (2,799 | ) |  | (2,002 | )
Employment credits |  | (862 | ) |  | (821 | ) |  | (407 | )
Changes in valuation allowances |  | 629 |  |  | 749 |  |  | 14,667 |
Non-deductible goodwill |  | — |  |  | 34 |  |  | 4,651 |
Tax Cuts and Jobs Act - Deferred Tax Effect |  | (73,028 | ) | — |  | — |  |  | — |
Stock-based compensation |  | (136 | ) |  | 368 |  |  | 386 |
Other |  | 278 |  |  | (1,035 | ) |  | 2,669 |
Provision for income taxes |  | $ | 5,561 |  |  | $ | 80,306 |  |  | $ | 88,172 |
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,
|  | 2017 |  | 2016
|  | (In thousands)
Deferred tax assets: |  |  |  |
Loss reserves and accruals |  | $ | 44,004 |  |  | $ | 59,884 |
Interest rate swaps |  | 259 |  |  | 5,598 |
Goodwill and intangible franchise rights |  | 2,770 |  |  | 5,907 |
U.S. state net operating loss (“NOL”) carryforwards |  | 17,430 |  |  | 16,848 |
Depreciation expense |  | — |  |  | 775 |
Foreign NOL carryforwards |  | 40,582 |  |  | 34,946 |
Other |  | 379 |  |  | — |
Deferred tax assets |  | 105,424 |  |  | 123,958 |
Valuation allowance on deferred tax assets |  | (54,415 | ) |  | (53,946 | )
Net deferred tax assets |  | $ | 51,009 |  |  | $ | 70,012 |
Deferred tax liabilities: |  |  |  |
Goodwill and intangible franchise rights |  | $ | (118,447 | ) |  | $ | (160,439 | )
Depreciation expense |  | (50,166 | ) |  | (64,465 | )
Deferred gain on bond redemption |  | (327 | ) |  | (1,023 | )
Other |  | (1,820 | ) |  | (3,317 | )
Deferred tax liabilities |  | (170,760 | ) |  | (229,244 | )
Net deferred tax liability |  | $ | (119,751 | ) |  | $ | (159,232 | )

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