Certain Transfers of Financial Assets (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Valuation Allowance for Impairment of Recognized Servicing Assets, Sales and Disposals [Abstract]
Valuation allowance, beginning balance	$ 1,600
Valuation allowance, ending balance	3,600	$ 1,600
Mortgage Servicing Rights
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Balance, beginning of year	42,474	88,150
Capitalized servicing rights	39,774	39,149
Amortization	(11,541)	(9,278)
Sales	0	(75,547)
Balance, end of period	70,707	42,474
Valuation Allowance for Impairment of Recognized Servicing Assets, Sales and Disposals [Abstract]
Valuation allowance, beginning balance	0	2,823
Increase (decrease) in valuation allowance	5,803	(2,823)
Valuation allowance, ending balance	5,803	0
MSRs, net	64,904	42,474
Fair value	$ 64,904	$ 44,502