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Derivative Instruments and Hedging Activities - Summary of Offsetting of Financial Assets and Derivative Assets (Detail) - USD ($) $ in Thousands | Jun. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Offsetting Assets [Line Items] |  |
Net Amounts of Assets Presented in the Consolidated Balance Sheet | $ 22,679 | $ 14,693
Interest Rate Swaps |  |
Offsetting Assets [Line Items] |  |
Gross Amount of Recognized Assets | 736 | 7,529
Gross Amounts Offset in the Consolidated Balance Sheet | 0 | 0
Net Amounts of Assets Presented in the Consolidated Balance Sheet | 736 | 7,529
Gross amounts not offset in the consolidated balance sheet, Financial instruments | 0 | 0
Gross amounts not offset in the consolidated balance sheet, Cash collateral received | 0 | 1,860
Gross amounts not offset in the consolidated balance sheet, Net amount | $ 736 | $ 5,669

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