Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Total amortization expense	$ 36,400	$ 10,300	$ 6,400
Amortization expense, 2017	35,120
Amortization expense, 2018	34,443
Amortization expense, 2019	33,107
Amortization expense, 2020	31,660
Amortization expense, 2021	31,302
Leases acquired
Finite-Lived Intangible Assets [Line Items]
Amortization expense, 2017	442
Amortization expense, 2018	426
Amortization expense, 2019	373
Amortization expense, 2020	314
Amortization expense, 2021	312
Amortization expense, thereafter	$ 1,300