STATEMENTS OF OPERATIONS DISCLOSURE - Acquisition, Integration, Restructuring, and Other Expenses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Restructuring and Related Activities [Abstract]
Restructuring expense	$ 22,635	$ 19,646	$ 7,718
Integration expenses	1,740	17,924	16,130
Change in fair value of contingent consideration	30	(7,364)	(5,786)
Total restructuring, integration, and other expense, net	$ 24,405	$ 30,206	$ 18,062