Loans - Loans Sales (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total net gains on loan sales		$ 1,981	$ 1,509	$ 3,391	$ 3,134
Corporate loan sales
Accounts, Notes, Loans and Financing Receivable [Line Items]
Proceeds from sales		2,178	3,991	5,376	12,312
Less book value of loans sold		2,132	3,861	5,248	11,984
Total net gains on loan sales	[1]	46	130	128	328
1-4 family mortgage loan sales
Accounts, Notes, Loans and Financing Receivable [Line Items]
Proceeds from sales		95,408	65,715	154,191	130,900
Less book value of loans sold		93,473	64,336	150,928	128,094
Total net gains on loan sales	[2]	$ 1,935	$ 1,379	$ 3,263	$ 2,806

[1] Net gains on corporate loan sales are included in other service charges, commissions, and fees in the Condensed Consolidated Statements of Income.

[2] Net gains on 1-4 family mortgage loan sales are included in mortgage banking income in the Condensed Consolidated Statements of Income.