Income Taxes (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Tax at U.S. statutory rate	21.00%	21.00%	35.00%
State taxes (percent)	1.00%	1.00%	1.00%
Non-deductible expenses (percent)	1.00%	1.00%	1.00%
Deductible tax asset write-off (percent)	0.00%	0.00%	5.00%
Non-taxable income (percent)	(1.00%)	(1.00%)	(1.00%)
Other (percent)	(1.00%)	(1.00%)	(1.00%)
Total (percent)	21.00%	21.00%	40.00%
Deferred tax assets:
Allowance for credit losses	$ 44,383	$ 44,224
Operating lease liabilities	20,894	0
Loan origination fees	10,638	11,328
Stock compensation	3,605	3,363
Non-accrual interest	2,351	1,724
Non-qualified deferred compensation	4,027	2,211
Other	2,544	2,517
Total deferred tax assets	88,442	65,367
Deferred tax liabilities:
Loan origination costs	(2,686)	(2,049)
Leases	(7,912)	(9,000)
Operating lease ROU assets	(19,644)	0
MSRs	(13,818)	(9,184)
Depreciation	(17,602)	(8,233)
Unrealized gain on securities	(2,379)	(138)
Other	(3,337)	(2,662)
Total deferred tax liabilities	(67,378)	(31,266)
Net deferred tax asset	$ 21,064	$ 34,101