Reporting Segments (Tables)

6 Months Ended

Jun. 30, 2013

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment [Table Text Block]

Reporting segment data is presented in the following table for the indicated periods:

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2013			2012			2013			2012
Revenue:
GETS	$	79,951		$	80,762		$	157,988		$	162,037
PSS	168,759			175,275			345,867			357,008
MRI	14,653			18,361			28,974			35,980
Total revenue	$	263,363		$	274,398		$	532,829		$	555,025
Gross profit:
GETS	$	22,755		$	23,454		$	44,279		$	46,701
PSS	21,873			23,761			44,143			48,199
MRI	6,917			8,313			13,274			16,313
Total gross profit	$	51,545		$	55,528		$	101,696		$	111,213
Operating profit:
GETS	$	6,008		$	6,021		$	11,283		$	11,959
PSS	3,394			5,069			7,499			10,863
MRI	2,250			2,738			4,127			4,991
Corporate	(6,410		)	(5,964		)	(12,754		)	(12,560		)
Total operating profit	5,242			7,864			10,155			15,253
Other income (expense), net	(62		)	(80		)	(113		)	(118		)
Income before income taxes	$	5,180		$	7,784		$	10,042		$	15,135

Reporting segment asset data is presented in the following table for the indicated periods:

	June 30,		December 31,
	2013		2012
Assets:
GETS	$	130,652	$	144,055
PSS	167,412		150,318
MRI	28,267		26,723
Corporate	61,994		79,609
Total assets	$	388,325	$	400,705