Condensed Consolidating Statements of Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Condensed Income Statements, Captions [Line Items]
Product sales	$ 84,114	$ 81,693	$ 246,730	$ 245,349
Service revenue	11,519	15,642	38,928	53,674
Net sales	95,633	97,335	285,658	299,023
Cost of product sales	67,514	61,535	197,211	195,170
Cost of service revenue	11,493	13,757	35,853	45,215
Cost of sales	79,007	75,292	233,064	240,385
Gross profit	16,626	22,043	52,594	58,638
Selling, general and administrative expenses	8,979	14,615	33,980	41,770
Restructuring expense	1,575	765	2,368	2,288
Acquisitions expense			0
Income from operations	6,072	6,663	16,246	14,580
Interest expense	(5,653)	(5,946)	(16,802)	(23,800)
Other, net	(136)	(75)	(89)	205
Income (loss) from equity investments in subsidiaries	0	0	0	0
Total other expense	(5,789)	(6,021)	(16,891)	(23,595)
Income (loss) before income taxes	283	642	(645)	(9,015)
Provision (benefit) for income taxes	249	(754)	408	(2,557)
Net loss	34	1,396	(1,053)	(6,458)
Change in foreign currency translation adjustment	(32)	(112)	(31)	(18)
Reclassification adjustment for losses on interest rate hedges included in net earnings, net of tax of $0, $0, $0 and $157	0	0	0	278
Total comprehensive income (loss)	2	1,284	(1,084)	(6,198)
LMIA(Guarantor Parent)
Condensed Income Statements, Captions [Line Items]
Product sales	4	(68)	207	617
Service revenue	7,640	9,172	26,729	28,474
Net sales	7,644	9,104	26,936	29,091
Cost of product sales	27	40	214	699
Cost of service revenue	7,991	9,106	27,440	28,330
Cost of sales	8,018	9,146	27,654	29,029
Gross profit	$ (374)	(42)	(718)	62
Selling, general and administrative expenses		421	0	421
Restructuring expense	$ 0	533	318	967
Acquisitions expense			0
Income from operations	(374)	(996)	(1,036)	(1,326)
Interest expense	(5,389)	(5,662)	(16,029)	(22,972)
Other, net	(1)	11	(1)	81
Income (loss) from equity investments in subsidiaries	3,541	4,874	9,914	9,571
Total other expense	(1,849)	(777)	(6,116)	(13,320)
Income (loss) before income taxes	(2,223)	(1,773)	(7,152)	(14,646)
Provision (benefit) for income taxes	(2,227)	(3,054)	(6,069)	(8,171)
Net loss	4	1,281	(1,083)	(6,475)
Change in foreign currency translation adjustment	0	0	0	0
Reclassification adjustment for losses on interest rate hedges included in net earnings, net of tax of $0, $0, $0 and $157		0		278
Total comprehensive income (loss)	4	1,281	(1,083)	(6,197)
Guarantor Subsidiaries
Condensed Income Statements, Captions [Line Items]
Product sales	84,099	81,724	246,699	245,327
Service revenue	11,545	15,620	38,942	53,688
Net sales	95,644	97,344	285,641	299,015
Cost of product sales	67,476	61,458	197,173	195,066
Cost of service revenue	11,166	13,803	35,155	45,372
Cost of sales	78,642	75,261	232,328	240,438
Gross profit	17,002	22,083	53,313	58,577
Selling, general and administrative expenses	8,979	14,194	33,980	41,349
Restructuring expense	1,575	232	2,050	1,321
Acquisitions expense			0
Income from operations	6,448	7,657	17,283	15,907
Interest expense	(264)	(284)	(773)	(828)
Other, net	(135)	(86)	(88)	124
Income (loss) from equity investments in subsidiaries	0	0	0	0
Total other expense	(399)	(370)	(861)	(704)
Income (loss) before income taxes	6,049	7,287	16,422	15,203
Provision (benefit) for income taxes	2,476	2,300	6,477	5,614
Net loss	3,573	4,987	9,945	9,589
Change in foreign currency translation adjustment	(32)	(112)	(31)	(18)
Reclassification adjustment for losses on interest rate hedges included in net earnings, net of tax of $0, $0, $0 and $157		0		0
Total comprehensive income (loss)	3,541	4,875	9,914	9,571
Consolidating/Eliminating Entries
Condensed Income Statements, Captions [Line Items]
Product sales	11	37	(176)	(595)
Service revenue	(7,666)	(9,150)	(26,743)	(28,488)
Net sales	(7,655)	(9,113)	(26,919)	(29,083)
Cost of product sales	11	37	(176)	(595)
Cost of service revenue	(7,664)	(9,152)	(26,742)	(28,487)
Cost of sales	(7,653)	(9,115)	(26,918)	(29,082)
Gross profit	$ (2)	2	(1)	(1)
Selling, general and administrative expenses		0	0	0
Restructuring expense	$ 0	0	0	0
Acquisitions expense			0
Income from operations	(2)	2	(1)	(1)
Interest expense	0	0	0	0
Other, net	0	0	0	0
Income (loss) from equity investments in subsidiaries	(3,541)	(4,874)	(9,914)	(9,571)
Total other expense	(3,541)	(4,874)	(9,914)	(9,571)
Income (loss) before income taxes	(3,543)	(4,872)	(9,915)	(9,572)
Provision (benefit) for income taxes	0	0	0	0
Net loss	(3,543)	(4,872)	(9,915)	(9,572)
Change in foreign currency translation adjustment	0	0	0	0
Reclassification adjustment for losses on interest rate hedges included in net earnings, net of tax of $0, $0, $0 and $157		0		0
Total comprehensive income (loss)	$ (3,543)	$ (4,872)	$ (9,915)	$ (9,572)