Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Sales and service revenue
Product sales	$ 83,153	$ 42,221	$ 165,267	$ 82,386
Service revenues	22,312	27,106	46,264	53,690
Net sales	105,465	69,327	211,531	136,076
Cost of sales and service revenue
Cost of product sales	63,592	29,189	128,730	56,574
Cost of service revenues	20,032	23,171	40,906	46,017
Cost of sales	83,624	52,360	169,636	102,591
Gross profit	21,841	16,967	41,895	33,485
Selling, general and administrative expenses	14,098	8,881	28,079	17,961
Contingent consideration write-off	(7,950)	0	(7,950)	0
Intangible asset impairment	4,222	0	4,222	0
Income from operations	11,471	8,086	17,544	15,524
Other income (expense):
Interest expense	(4,044)	(293)	(8,157)	(494)
Other, net	(80)	(62)	400	107
Total other expense	(4,124)	(355)	(7,757)	(387)
Income before income taxes	7,347	7,731	9,787	15,137
Provision for income taxes	2,683	2,626	3,286	5,240
Net income	4,664	5,105	6,501	9,897
Other comprehensive income (expense):
Change in foreign currency translation adjustment	(15)	0	(137)	0
Unrealized gain (loss) on interest rate hedges net of tax	151	0	(10)	0
Other comprehensive income (expense):	136	0	(147)	0
Total comprehensive income	$ 4,800	$ 5,105	$ 6,354	$ 9,897
Amounts per common share:
Net income per common share (in dollars per share)	$ 0.37	$ 0.44	$ 0.52	$ 0.85
Net income per common share assuming dilution (in dollars per share)	$ 0.37	$ 0.43	$ 0.51	$ 0.84
Weighted average common shares outstanding (in shares)	12,612,389	11,671,388	12,597,381	11,644,698
Weighted average dilutive common shares outstanding (in shares)	12,720,372	11,833,503	12,697,947	11,809,972