Schedule II - Schedule of Valuation and Qualifying Accounts (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Valuation and Qualifying Accounts [Abstract]
Balance at Beginning of Year	$ 20,129	$ 41,573	$ 34,769
Additions charged against operations	8,205	65,512	9,397
Deductions,Net recoveries/write offs	(950)	(86,956)	(2,593)
Balance at end of year	$ 27,384	$ 20,129	$ 41,573