Quarterly Results (unaudited) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended												12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Selected Quarterly Financial Information [Abstract]
Net sales	$ 53,595	$ 57,245	$ 57,193	$ 63,634	$ 64,646	$ 60,394	$ 62,886	$ 60,978	$ 64,087	$ 60,077	$ 55,592	$ 52,672	$ 231,667	$ 248,904	$ 232,428
Gross margin	30,731	30,616	31,981	35,443	33,728	35,540	35,590	35,995	40,216	36,128	36,861	30,569	128,771	140,853	143,774
Income (loss) before income taxes	(629)	(4,579)	(27,408)	(3,478)	(16,571)	(2,142)	(3,758)	(2,258)	(208)	(1,255)	341	(744)	(36,094)	(24,729)	(1,866)
Net loss	(269)	(4,101)	(28,120)	(6,493)	(17,252)	(3,826)	(5,879)	(1,863)	(1,244)	(1,013)	(1,685)	(1,589)	(38,983)	(28,820)	(5,531)
Net loss attributable to Merge	(293)	(4,105)	(28,107)	(6,475)	(17,264)	(3,814)	(5,882)	(1,842)	(1,252)	(995)	(1,685)	(1,589)	(38,980)	(28,802)	(5,521)
Net loss attributable to common shareholders of Merge									(1,252)	(995)	(3,272)	(3,155)	(38,980)	(28,802)	(8,674)
Basic and diluted loss per share (in dollars per share)	$ 0	$ (0.04)	$ (0.30)	$ (0.07)	$ (0.19)	$ (0.04)	$ (0.06)	$ (0.02)	$ (0.01)	$ (0.01)	$ (0.04)	$ (0.04)
Loss on debt extinguishment			(23,822)										(23,822)	0	0
Unamortized debt issuance costs	5,235		5,235										5,235
Unamortized net debt discount	1,724		1,724										1,724
Early retirement costs associated with the extinguishment of the Notes			16,863										16,863	0	0
Impairment of finite-lived intangible assets					3,872
Write-off of acquired intangibles excluding goodwill					1,269
Write off of reserve for revenues in excess of billings and uncollectible billings					9,163
Net loss attributable to changes in bad debts and sales returns (in dollars per share)					$ 0.15									$ 0.09
Net loss attributable to changes of revenues in excess of billings					$ 1,308									$ 14,304