Loans (Details) - Loans Sales - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total net gains on loan sales		$ 1,680	$ 1,770	$ 2,965	$ 2,996
Corporate loan sales
Accounts, Notes, Loans and Financing Receivable [Line Items]
Proceeds from sales		14,271	4,138	23,859	9,423
Less book value of loans sold		13,760	3,864	22,890	9,009
Total net gains on loan sales	[1]	511	274	969	414
1-4 family mortgage loan sales
Accounts, Notes, Loans and Financing Receivable [Line Items]
Proceeds from sales		53,258	53,445	92,765	89,027
Less book value of loans sold		52,089	51,949	90,769	86,445
Total net gains on loan sales	[2]	$ 1,169	$ 1,496	$ 1,996	$ 2,582

[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.