Mortgage Banking Activities (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Principal Transaction Revenue [Line Items]
Loans originated for sale	$ 211,900	$ 145,000	$ 427,323	$ 220,266
Proceeds from sale of loans	229,200	130,400	454,737	211,432
Mortgage banking activities
Principal Transaction Revenue [Line Items]
Gain on loans sold	4,164	1,825	8,507	3,298
(Loss) gain resulting from the change in fair value of loans held-for-sale	(1,255)	534	(939)	352
Gain (loss) resulting from the change in fair value of derivatives	499	305	(492)	631
Net revenue from mortgage banking activities	$ 3,408	$ 2,664	$ 7,076	$ 4,281