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Income Taxes (Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Income Taxes [Abstract] |  |
Allowance for loan losses | $ 51,517 | $ 89,120
Employee compensation and benefits | 9,783 | 28,401
Loan purchase accounting adjustments | 6,441 | 12,047
Tax credit carryforward | 21,274 | 29,085
Securities | 12,250 | 23,169
State net operating loss | 1,979 | 1,690
Other | 15,407 | 14,583
Gross deferred tax assets | 118,651 | 198,095
State valuation allowance | (1,979) | (1,690)
Subtotal valuation allowance | (1,979) | (1,690)
Net deferred tax assets | 116,672 | 196,405
Fixed assets & intangibles | (56,526) | (74,518)
FDIC indemnification asset |  | (6,293)
Other | (6,167) | (11,159)
Gross deferred tax liabilities | (62,693) | (91,970)
Net deferred tax asset | $ 53,979 | $ 104,435

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