Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Total amortization expense	$ 10,300,000	$ 6,400,000	$ 6,800,000
Amortization expense, 2016	35,182,000
Amortization expense, 2017	34,204,000
Amortization expense, 2018	33,528,000
Amortization expense, 2019	32,100,000
Amortization expense, 2020	30,804,000
Leases acquired [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization expense, 2016	444,000
Amortization expense, 2017	444,000
Amortization expense, 2018	426,000
Amortization expense, 2019	372,000
Amortization expense, 2020	313,000
Amortization expense, thereafter	$ 1,700,000