Derivative Instruments - (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Not designated as hedging instruments:
Derivative financial instruments
Derivative assets	$ 6,786	$ 9,108
Derivative liabilities	2,477	2,500
Designated as hedging instruments:
Derivative financial instruments
Derivative liabilities	3,404	3,410
Other Assets | Not designated as hedging instruments: | Interest rate contracts
Derivative financial instruments
Derivative assets	1,882	1,985
Other Assets | Not designated as hedging instruments: | Interest rate lock commitments
Derivative financial instruments
Derivative assets	3,781	2,643
Other Assets | Not designated as hedging instruments: | Forward commitments
Derivative financial instruments
Derivative assets	1,123	4,480
Other Liabilities | Not designated as hedging instruments: | Interest rate contracts
Derivative financial instruments
Derivative liabilities	1,882	1,985
Other Liabilities | Not designated as hedging instruments: | Interest rate lock commitments
Derivative financial instruments
Derivative liabilities	70	246
Other Liabilities | Not designated as hedging instruments: | Forward commitments
Derivative financial instruments
Derivative liabilities	525	269
Other Liabilities | Designated as hedging instruments: | Interest rate swaps
Derivative financial instruments
Derivative liabilities	$ 3,404	$ 3,410