Derivative Financial Instruments (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($)
Gross gains and losses on derivative assets and liabilities recorded in Consolidated Statements of Income
Net gains	$ 74
Non-interest income
Gross gains and losses on derivative assets and liabilities recorded in Consolidated Statements of Income
Gross gains	3,865
Non-interest expense
Gross gains and losses on derivative assets and liabilities recorded in Consolidated Statements of Income
Gross losses	(3,791)
Foreign
Gross gains and losses on derivative assets and liabilities recorded in Consolidated Statements of Income
Foreign loan balance, gross	700
Other assets
Fair values of derivative assets and liabilities recorded in consolidated balance sheets
Fair value recorded in other assets	2,799
Other liabilities
Fair values of derivative assets and liabilities recorded in consolidated balance sheets
Fair value recorded in other liabilities	3,791
Interest Rate Lock Commitments
Derivative Financial Instruments
Aggregate notional amount	217,400
Forward Sales Commitments
Derivative Financial Instruments
Aggregate notional amount	306,200
Foreign currency forward contracts
Derivative Financial Instruments
Aggregate notional amount	669
Foreign currency forward contracts | Other assets
Gross gains and losses on derivative assets and liabilities recorded in Consolidated Statements of Income
Fair value recorded in other assets	$ 5