Inventories - Allowance for Excess and Obsolete Inventory (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Allowance for Excess and Obsolete Inventory [Abstract]
Balance at beginning of year	$ 21,368	$ 5,700
Provision	8,827	10,488
Additions from acquisitions	2,064	8,221
Charges	(10,722)	(3,041)
Balance at end of year	$ 21,537	$ 21,368