Derivative Instruments and Hedging Activities (Details) - Narrative - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Jun. 30, 2016
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest rate cash flow hedge gain (loss) to be reclassified during the next 12 months, net	$ 3,900
Capital market products income	$ 10,024	$ 4,806	$ 2,231
Portion of fair value outstanding, interest rate swaps covered by collateral agreements (percent)	100.00%	100.00%
Cash Flow Hedging
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of variable rate loans hedged using interest rate swaps	$ 735,000
Amount hedged of borrowed funds using forward starting interest rate swaps	$ 735,000
Forward starting interest rate swaps				$ 325,000