Derivative Instruments and Hedging Activities - Fair Value of Derivative Financial Instruments (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Fair value, derivative assets	$ 432	$ 7,529
Fair value, derivative liabilities	45,727	9,077
Designated as Hedging Instrument | Other assets
Derivative Instruments, Gain (Loss) [Line Items]
Fair value, derivative assets	0	256
Designated as Hedging Instrument | Other assets | Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Fair value, derivative assets	0	256
Designated as Hedging Instrument | Other liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Fair value, derivative liabilities	21,374	1,502
Designated as Hedging Instrument | Other liabilities | Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Fair value, derivative liabilities	21,374	1,502
Not Designated as Hedging Instrument | Other assets
Derivative Instruments, Gain (Loss) [Line Items]
Fair value, derivative assets	23,608	14,437
Not Designated as Hedging Instrument | Other assets | Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Fair value, derivative assets	23,301	14,300
Not Designated as Hedging Instrument | Other assets | Interest rate caps
Derivative Instruments, Gain (Loss) [Line Items]
Fair value, derivative assets	9
Not Designated as Hedging Instrument | Other assets | Credit contracts
Derivative Instruments, Gain (Loss) [Line Items]
Fair value, derivative assets	219	68
Not Designated as Hedging Instrument | Other assets | Residential mortgage loan commitments
Derivative Instruments, Gain (Loss) [Line Items]
Fair value, derivative assets	79	69
Not Designated as Hedging Instrument | Other liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Fair value, derivative liabilities	24,565	14,784
Not Designated as Hedging Instrument | Other liabilities | Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Fair value, derivative liabilities	24,797	14,730
Not Designated as Hedging Instrument | Other liabilities | Interest rate caps
Derivative Instruments, Gain (Loss) [Line Items]
Fair value, derivative liabilities	9
Not Designated as Hedging Instrument | Other liabilities | Credit contracts
Derivative Instruments, Gain (Loss) [Line Items]
Fair value, derivative liabilities	(241)	54
Not Designated as Hedging Instrument | Other liabilities | Residential mortgage loan commitments
Derivative Instruments, Gain (Loss) [Line Items]
Fair value, derivative liabilities	$ 0	$ 0