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Derivatives and Hedging Activities - Summary of Effect of Hedges on AOCI in Consolidated Statements of Comprehensive Income Related to Company's Derivative Assets and Liabilities (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]    
Change in unrealized gains and losses on derivative hedges $ 14,525 $ (2,088)
Gain (Loss) Reclassified from AOCI into Earnings (768) 5
Derivatives Designated as Hedging Instruments [Member] | Cash Flow Hedging [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Change in unrealized gains and losses on derivative hedges 14,525 (2,088)
Gain (Loss) Recognized in OCI Included Component 18,887 (2,088)
Loss Recognized in OCI Excluded Component (4,362)  
Gain (Loss) Reclassified from AOCI into Earnings (768) 5
Gain (Loss) Reclassified from AOCI into Earnings Included Component (132) 5
Gain (Loss) Reclassified from AOCI into Earnings Excluded Component (636)  
Derivatives Designated as Hedging Instruments [Member] | Interest Rate Floor [Member] | Cash Flow Hedging [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Change in unrealized gains and losses on derivative hedges 24,934  
Gain (Loss) Recognized in OCI Included Component 29,296  
Loss Recognized in OCI Excluded Component (4,362)  
Gain (Loss) Reclassified from AOCI into Earnings (636)  
Gain (Loss) Reclassified from AOCI into Earnings Excluded Component (636)  
Derivatives Designated as Hedging Instruments [Member] | Interest Rate Swap [Member] | Cash Flow Hedging [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Change in unrealized gains and losses on derivative hedges (10,409) (2,088)
Gain (Loss) Recognized in OCI Included Component (10,409) (2,088)
Gain (Loss) Reclassified from AOCI into Earnings (132) 5
Gain (Loss) Reclassified from AOCI into Earnings Included Component $ (132) $ 5