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Income Taxes - Significant Components of The Company's Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017 | Sep. 30, 2017
--- | --- | --- | ---
Deferred tax assets |  |  |
Allowance for loan losses | $ 14,030 | $ 13,966 | $ 20,421
Loans | 20,044 | 15,062 | 25,585
Deferred compensation | 9,441 | 7,093 | 10,857
Securities | 0 | 3,659 | 2,573
Net unrealized losses on securities - OCI | 8,340 | 0 | 1,942
Impairment of assets | 1,774 | 1,748 | 2,383
Federal and State net operating loss carryforwards | 21,478 | 2,419 | 3,338
Intangibles | 0 | 0 | 0
Other | 5,729 | 4,722 | 7,319
Total deferred tax assets | 80,836 | 48,669 | 74,418
Deferred tax liabilities |  |  |
Investment in partnerships | 1,673 | 757 | 946
Intangibles | 0 | 0 | 428
Fixed assets | 3,645 | 3,163 | 1,429
Mortgage servicing rights | 11,224 | 10,139 | 3,360
Junior subordinated debt | 1,562 | 2,394 | 3,620
Other | 1,747 | 1,859 | 1,770
Total deferred tax liabilities | 19,851 | 18,312 | 11,553
Net deferred tax assets | $ 60,985 | $ 30,357 | $ 62,865

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