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Income Taxes - Significant Components of The Company's Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017 | Jun. 30, 2017
--- | --- | --- | ---
Deferred tax assets |  |  |
Allowance for loan losses | $ 15,800 | $ 13,966 | $ 20,566
Loans | 11,789 | 15,062 | 19,575
Deferred compensation | 7,098 | 7,093 | 9,845
Securities | 0 | 3,659 | 2,440
Net unrealized losses on securities - OCI | 6,916 | 0 | 6,670
Impairment of assets | 1,791 | 1,748 | 1,986
Federal and State net operating loss carryforwards | 1,297 | 2,419 | 3,081
Intangibles | 0 | 0 | 1,758
Other | 4,310 | 4,722 | 3,577
Total deferred tax assets | 49,001 | 48,669 | 69,498
Deferred tax liabilities |  |  |
Investment in partnerships | 548 | 757 | 1,272
Fixed assets | 3,073 | 3,163 | 1,875
Mortgage servicing rights | 11,224 | 10,139 | 3,360
Junior subordinated debt | 2,352 | 2,394 | 4,004
Other | 1,665 | 1,859 | 2,000
Total deferred tax liabilities | 18,862 | 18,312 | 12,511
Net deferred tax assets | $ 30,139 | $ 30,357 | $ 56,987

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