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Income Taxes - Tax Effects of Temporary Differences Representing Deferred Tax Assets/Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Jan. 01, 2018 | Dec. 31, 2017
--- | --- | --- | ---
Deferred tax assets: |  |  |
Loss reserves and accruals | $ 41,779 |  | $ 44,004
Interest rate swaps | 0 |  | 259
Goodwill and intangible franchise rights | 44 |  | 2,770
U.S. state net operating loss (“NOL”) carryforwards | 17,894 |  | 17,430
Depreciation expense | 433 |  | 0
Foreign NOL carryforwards | 37,587 |  | 40,582
Other | 84 |  | 379
Deferred tax assets | 97,821 |  | 105,424
Valuation allowance on deferred tax assets | (52,257) |  | (54,415)
Net deferred tax assets | 45,564 |  | 51,009
Deferred tax liabilities: |  |  |
Goodwill and intangible franchise rights | (123,659) |  | (118,447)
Depreciation expense | (50,172) |  | (50,166)
Deferred gain on bond redemption | 0 |  | (327)
Interest rate swaps | (2,788) |  | 0
Other | (72) |  | (1,820)
Deferred tax liabilities | (176,691) |  | (170,760)
Net deferred tax liability | $ (131,127) | $ (127,897) | $ (119,751)

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