Derivative Instruments and Hedging Activities - Summary of Offsetting of Financial Liabilities and Derivative Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Offsetting Assets [Line Items]
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet	$ 13,932	$ 9,716
Interest rate swaps
Offsetting Assets [Line Items]
Gross Amount of Recognized Liabilities	13,932	9,703
Gross Amounts Offset in the Consolidated Balance Sheet	0	0
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet	13,932	9,703
Financial Instruments	0	192
Cash Collateral Pledged	13,932	9,511
Net Amount	$ 0	$ 0