Income Taxes Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Gross deferred tax assets:
Allowance for loan and OREO losses	$ 21,919	$ 22,782
Interest on nonaccrual loans	254	295
Stock compensation	2,679	3,156
Deferred and accrued compensation	15,540	11,822
Contingent payments	0	1,236
Unrealized loss on investments	6,781	3,345
Other	1,294	1,437
Gross deferred tax assets	48,467	44,073
Total deferred tax assets	48,467	44,073
Gross deferred tax liabilities:
Deferred income on repurchase of debt	0	832
Goodwill and acquired intangible assets	11,492	12,246
Fixed assets	2,248	991
Prepaid expenses	344	347
Deferred Tax Liabilities, Contingent Payments	7,680	0
Other	65	626
Total gross deferred tax liabilities	21,829	15,042
Net deferred tax asset	$ 26,638	$ 29,031