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Derivative Instruments and Hedging Activities - Summary of Offsetting of Financial Liabilities and Derivative Liabilities (Detail) - USD ($)
$ in Thousands
Jun. 30, 2016
Dec. 31, 2015
Offsetting Liabilities [Line Items]    
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet $ 27,624 $ 13,932
Interest Rate Swaps    
Offsetting Liabilities [Line Items]    
Gross Amount of Recognized Liabilities 27,586 13,932
Gross Amounts Offset in the Consolidated Balance Sheet 0 0
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet 27,586 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 27,586 13,932
Gross amounts not offset in the consolidated balance sheet, Net amount $ 0 $ 0