Contingent Liabilities, Commitments, and Financial Instruments with Off-Balance-Sheet Risk (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Gross rental expense	$ 3,730	$ 4,180
Liability for repurchases	$ 290		$ 290
Operating lease right of use assets			24,147
Operating Lease, Right-of-Use Asset, Corporate Office Building			14,650
Operating lease liabilities			24,319
Operating Lease, Liability, Corporate Office Building			$ 14,640