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Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Deferred tax assets: |  |
Loss reserves | $ 65,015 | $ 91,390
Employee benefits | 64,843 | 50,404
Equity investments | 0 | 28,547
Accrued expenses | 15,763 | 16,052
Credit carryforwards | 0 | 64,835
Federal loss carryforwards | 49,821 | 62,010
State loss carryforwards | 7,225 | 19,801
Investment in debt securities (ASC 320) | 24,863 | 8,811
Other | 27,168 | 11,512
Gross deferred tax assets | 254,698 | 353,362
Valuation allowance | (74) | (147)
Deferred tax assets after valuation allowance | 254,624 | 353,215
Deferred tax liabilities: |  |
Depreciation and amortization | 51,519 | 43,040
Equity investments | 7,705 | 0
Other intangible assets | 57,632 | 55,923
Prepaid expenses | 9,218 | 9,255
Real estate investment trust income | 0 | 22,576
Other | 683 | 602
Gross deferred tax liabilities | 126,757 | 131,396
Net deferred tax assets | $ 127,867 | $ 221,819

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- Definition The tax effect as of the balance sheet date of the amount of the estimated future tax deductions arising from the provision for loan losses, which can only be deducted for tax purposes when actual loan losses are known, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the deduction to be taken. Also includes losses associated with the repurchase obligations and other loss reserves. + References No definition available. + Details
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