Derivative Instruments and Hedging Activities - Summary of Offsetting of Financial Liabilities and Derivative Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Offsetting Assets [Line Items]
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet	$ 22,957	$ 13,932
Interest Rate Swaps
Offsetting Assets [Line Items]
Gross Amount of Recognized Liabilities	22,923	13,932
Gross Amounts Offset in the Consolidated Balance Sheet	0	0
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet	22,923	13,932
Gross amounts not offset in the consolidated balance sheet, Financial instruments	0	0
Gross amounts not offset in the consolidated balance sheet, Cash collateral pledged	22,832	13,932
Gross amounts not offset in the consolidated balance sheet, Net amount	$ 91	$ 0