Derivative and Hedging Activities - Summary of Amounts Reclassified from Accumulated Other Comprehensive Income (AOCI) (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Reclassified from AOCI to interest expense	$ 16,562	$ 11,681	$ 31,962	$ 23,129
Reclassification out of Accumulated Other Comprehensive Income [Member] | Total [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Reclassified from AOCI to interest income			1,368
Reclassified from AOCI to interest expense			286
Reclassification out of Accumulated Other Comprehensive Income [Member] | Net of Tax [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Reclassified from AOCI to interest income			889
Reclassified from AOCI to interest expense			$ 186