Derivative Instruments and Hedging Activities - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Sep. 30, 2016 USD ($) Swap	Jun. 30, 2015 USD ($) Swap
Derivative Instruments, Gain (Loss) [Line Items]
Loss related to ineffective portion of derivatives recognized in other expense (income), net	$ (1,000)	$ (287,000)
Reclassified as an increase to interest expense, expected during the next 12 months	12,730,000
Unrealized loss on derivatives, tax benefit	(2,713,000)	(6,115,000)
Termination value of derivatives in a net liability position	24,001,000
Collateral posted relating to credit risk-related contingent features	0
Interest Rate Swaps [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Number of interest rate swaps matured | Swap			4
Forward Swaps [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount of interest rate swap				$ 1,000,000,000
Number of interest rate swaps held | Swap				5
Combined Interest Rate Cash Flow Hedges, All Swaps [Member] | Interest Rate Swaps [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount of interest rate swap			$ 1,250,000,000
Number of interest rate swaps matured | Swap			4
Combined Interest Rate Cash Flow Hedges, All Swaps [Member] | Forward Swaps [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount of interest rate swap			$ 1,000,000,000
Number of interest rate swaps held | Swap			5
Not Designated as Hedge Accounting Relationships [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives outstanding	$ 0	$ 0