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Income Taxes - Significant Components of The Company's Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Jun. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Deferred tax assets |  |
Allowance for credit losses | $ 39,448 | $ 14,304
Loans | 11,336 | 10,284
Deferred compensation | 10,390 | 12,050
Impairment of assets | 1,353 | 1,108
Net operating loss carryforwards | 4,785 | 9,387
Lease liabilities under operating leases | 22,357 | 22,686
Other | 1,782 | 934
Total deferred tax assets | 91,451 | 70,753
Deferred tax liabilities |  |
Net unrealized gains on securities | 5,507 | 190
Investment in partnerships | 807 | 967
Fixed assets | 2,951 | 2,952
Mortgage servicing rights | 13,027 | 13,472
Junior subordinated debt | 2,260 | 2,304
Lease right-of-use asset | 21,354 | 21,727
Other | 1,615 | 1,859
Total deferred tax liabilities | 47,521 | 43,471
Net deferred tax assets | $ 43,930 | $ 27,282

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