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Income Taxes (Details 3) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Net deferred tax liabilities comprised    
Loss reserves and accruals $ 59,884 $ 53,747
Interest rate swaps 5,598 11,671
Deferred Tax Assets, Goodwill and Intangible Assets 5,907 7,621
State net operating loss ("NOL") carryforwards 16,848 17,413
Deferred tax assets, depreciation expense 775 0
Deferred Tax Assets, Operating Loss Carryforwards, Foreign 34,946 20,408
Deferred Tax Assets, Gross 123,958 110,860
Valuation allowance on state NOL (53,946) (46,547)
Deferred Tax Assets, Net of Valuation Allowance 70,012 64,313
Goodwill and intangible franchise rights (160,439) (143,509)
Depreciation expense (64,465) (53,619)
Deferred tax liabilities deferred gain on bond redemption (1,023) (1,535)
Other (3,317) (1,060)
Deferred Tax Liabilities, Gross (229,244) (199,723)
Deferred Tax Liabilities, Net $ (159,232) $ (135,410)