Segment and Geographic Information (Details) $ in Thousands	3 Months Ended						12 Months Ended
	Dec. 31, 2015 USD ($)	Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Sep. 30, 2014 USD ($)	Dec. 31, 2015 USD ($) market segment	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Segment Reporting [Abstract]
Number of markets | market							3
Number of reportable segments | segment							3
Goodwill impairment	$ 43,500						$ 43,484	$ 51,512	$ 0
Restructuring charges	$ 300	$ 1,500	$ 5,700	$ 3,500	$ 9,500	$ 40,000	968	687	0
Acquisition-related expenses							$ 1,912	$ 1,375	$ 5,831