Reporting Segments Reporting segment asset data (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Assets:
Total assets	$ 339,097	$ 372,220
GETS [Member]
Assets:
Total assets	99,210	120,223
PSS [Member]
Assets:
Total assets	172,429	159,774
MRI [Member]
Assets:
Total assets	23,273	23,539
Corporate [Member]
Assets:
Total assets	$ 44,185	$ 68,684