Reporting Segments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Segment Reporting Information [Line Items]
Restructuring Charges	$ 370	$ 0
Revenue	276,272	269,466
Gross profit	50,763	50,151
Operating profit	4,685	4,913
Other income (expense), net	(82)	(51)
Assets	406,673		405,807
Income before income taxes	4,603	4,862
CEO Compensation - Net Income	856
CEO Compensation - Operating Charge	668
CEO Compensation - Operating Charge (after Tax)	421
CEO Separation - DTA Write-off	435
GETS [Member]
Segment Reporting Information [Line Items]
Restructuring Charges	333	0
Revenue	82,254	78,037
Gross profit	22,400	21,524
Operating profit	1,556	1,880
Assets	135,392		130,269
PSS [Member]
Segment Reporting Information [Line Items]
Restructuring Charges	37	0
Revenue	180,139	177,108
Gross profit	21,946	22,270
Operating profit	6,145	6,165
Assets	200,239		168,786
MRI [Member]
Segment Reporting Information [Line Items]
Restructuring Charges	0	0
Revenue	13,879	14,321
Gross profit	6,417	6,357
Operating profit	1,260	1,629
Assets	29,985		28,098
Corporate [Member]
Segment Reporting Information [Line Items]
Restructuring Charges	0	0
Operating profit	(4,276)	(4,761)
Assets	$ 41,057		$ 78,654