Leases - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating Leased Assets [Line Items]
Weighted average effective interest rate (percent)			8.17%
Operating leases expire through various dates			2053
Rent expense			$ 199,975	$ 105,391	$ 112,704
Minimum [Member]
Operating Leased Assets [Line Items]
Capital lease expiration period			2015
Maximum [Member]
Operating Leased Assets [Line Items]
Capital lease expiration period			2053
Atlanta 1 Capital Lease [Member]
Operating Leased Assets [Line Items]
Capital lease asset	$ 21,274
Atlanta 2 Capital Lease [Member]
Operating Leased Assets [Line Items]
Capital lease asset		$ 25,960
Capital lease liability		$ 26,230