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Income Taxes (Details 3) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Valuation Allowance [Line Items] |  |  |
Deferred Income Tax Expense (Benefit) | $ (46,063) | $ 14,162 | $ 11,884
Net deferred tax liabilities comprised |  |  |
Loss reserves and accruals | 44,004 | 59,884 |
Interest rate swaps | 259 | 5,598 |
Deferred Tax Assets, Goodwill and Intangible Assets | 2,770 | 5,907 |
State net operating loss ("NOL") carryforwards | 17,430 | 16,848 |
Deferred tax assets, depreciation expense | 0 | 775 |
Deferred Tax Assets, Operating Loss Carryforwards, Foreign | 40,582 | 34,946 |
Deferred Tax Assets, Other | 379 | 0 |
Deferred Tax Assets, Gross | 105,424 | 123,958 |
Valuation allowance on state NOL | (54,415) | (53,946) |
Deferred Tax Assets, Net of Valuation Allowance | 51,009 | 70,012 |
Goodwill and intangible franchise rights | (118,447) | (160,439) |
Depreciation expense | (50,166) | (64,465) |
Deferred tax liabilities deferred gain on bond redemption | (327) | (1,023) |
Other | (1,820) | (3,317) |
Deferred Tax Liabilities, Gross | (170,760) | (229,244) |
Deferred Tax Liabilities, Net | $ (119,751) | $ (159,232) |

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