Inventories, Net (Details) - Allowance for Excess and Obsolete Inventory - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Inventory Valuation And Obsolescence [Roll Forward]
Balance at beginning of year	$ 21,537	$ 21,368
Provision	32,072	8,827	$ 10,500
Additions from acquisitions	0	2,064
Charges	(20,077)	(10,722)
Balance at end of year	$ 33,532	$ 21,537	$ 21,368