Derivative Instruments and Hedging Activities - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018	May 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Amount of variable rate loans hedged using interest rate swaps	$ 1,100,000
Amount hedged of borrowed funds using forward starting interest rate swaps	1,100,000			$ 740,000
Amount to be hedged of borrowed funds using forward starting interest rate swaps	$ 400,000
Weighted-average interest rate to be paid	2.53%
Interest rate cash flow hedge loss to be reclassified during next 12 months, net	$ 1,500
Capital market products income	$ 1,279	$ 1,558
Portion of fair value of outstanding interest rate swaps covered by collateral agreements (percent)	100.00%		100.00%