Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Sales and service revenue
Product sales	$ 81,076	$ 42,794	$ 246,343	$ 125,180
Service revenues	23,580	27,842	69,844	81,532
Net sales	104,656	70,636	316,187	206,712
Cost of sales and service revenue
Cost of product sales	63,579	32,757	192,309	89,331
Cost of service revenues	20,659	19,295	61,565	65,312
Cost of sales	84,238	52,052	253,874	154,643
Gross profit	20,418	18,584	62,313	52,069
Selling, general and administrative expenses	13,783	10,050	41,862	28,011
Contingent consideration write-off	0	0	(7,950)	0
Intangible asset impairment	0	0	4,222	0
Income from operations	6,635	8,534	24,179	24,058
Other income (expense):
Interest expense	(4,328)	(270)	(12,485)	(764)
Other, net	49	174	449	281
Total other expense	(4,279)	(96)	(12,036)	(483)
Income before income taxes	2,356	8,438	12,143	23,575
Provision for income taxes	281	2,799	3,567	8,039
Net income	2,075	5,639	8,576	15,536
Other comprehensive income (expense):
Change in foreign currency translation adjustment	118	(16)	(19)	(16)
Unrealized gain (loss) on interest rate hedges net of tax	(153)	0	(163)	0
Other comprehensive income (expense):	(35)	(16)	(182)	(16)
Total comprehensive income	$ 2,040	$ 5,623	$ 8,394	$ 15,520
Amounts per common share:
Net income per common share (in dollars per share)	$ 0.16	$ 0.48	$ 0.68	$ 1.33
Net income per common share assuming dilution (in dollars per share)	$ 0.16	$ 0.48	$ 0.67	$ 1.31
Weighted average common shares outstanding (in shares)	12,617,121	11,736,392	12,604,033	11,675,453
Weighted average dilutive common shares outstanding (in shares)	12,718,807	11,857,611	12,710,396	11,827,867