Business Segments - EBITDA and Adjusted EBITDA (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2015	Sep. 30, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting [Abstract]
Adjusted EBITDA			$ 51,896	$ 42,838	$ 26,901
Depreciation and amortization			(17,472)	(17,723)	(13,664)
Stock-based compensation			(5,873)	(5,352)	(4,733)
Change in fair value of contingent consideration			270	37,873	31,331
Goodwill impairment charge		$ (37,900)	(37,539)	0	(37,908)
Intangible asset impairment charges	$ (200)		(202)	(2,710)	0
Restructuring and other charges			(1,053)	0	(4,322)
Secured asset reserve			(2,022)	(940)	0
Restatement-related professional fees			0	(2,093)	0
Payments to former owner of Productions Graphics, net of cash recovered			0	0	(2,625)
Legal fees in connection with patent infringement			0	0	(961)
Total other expense			(7,678)	(5,118)	(3,235)
Income (loss) before income taxes			$ (19,673)	$ 46,775	$ (9,216)