Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Sales and service revenue
Product sales	$ 82,114	$ 40,165
Service revenues	23,952	26,584
Net sales	106,066	66,749
Cost of sales and service revenue
Cost of product sales	65,138	27,385
Cost of service revenues	20,874	22,846
Cost of sales	86,012	50,231
Gross profit	20,054	16,518
Selling, general and administrative expenses	13,981	9,080
Income from operations	6,073	7,438
Other income (expense):
Interest expense	(4,113)	(201)
Other, net	480	169
Total other expense	(3,633)	(32)
Income before income taxes	2,440	7,406
Provision for income taxes	603	2,614
Net income	1,837	4,792
Other comprehensive income (expense):
Change in foreign currency translation adjustment	(122)	0
Unrealized loss on interest rate hedge net of tax of $94	(161)	0
Other comprehensive income (expense):	283	0
Total comprehensive income	$ 1,554	$ 4,792
Amounts per common share:
Net income per common share (in dollars per share)	$ 0.15	$ 0.41
Net income per common share assuming dilution (in dollars per share)	$ 0.14	$ 0.41
Weighted average common shares outstanding (in shares)	12,582,207	11,618,008
Weighted average dilutive common shares outstanding (in shares)	12,693,657	11,783,241