Segment Reporting - Financial Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($) segment	Mar. 31, 2016 USD ($)	Dec. 31, 2016 USD ($)
Segment reporting
Number of operating segments | segment	4
Total Revenues	$ 120,835	$ 124,668
Income (loss) before income tax expense (benefit)	3,811	(3,638)
Identifiable assets	884,656	1,617,223	$ 775,285
Reserve for probable settlement		2,500
Legal Fees		300
Cash and stock awards	2,800
U.S. Operations
Segment reporting
Total Revenues	53,393	66,329
Income (loss) before income tax expense (benefit)	(6,604)	2,105
Identifiable assets	412,323	1,196,340
Canadian Operations
Segment reporting
Total Revenues	16,482	16,096
Income (loss) before income tax expense (benefit)	3,498	3,338
Identifiable assets	90,276	100,599
European Operations
Segment reporting
Total Revenues	36,712	31,139
Income (loss) before income tax expense (benefit)	11,201	5,679
Identifiable assets	330,309	253,135
Asia Pacific Operations
Segment reporting
Total Revenues	13,943	10,757
Income (loss) before income tax expense (benefit)	1,845	(600)
Identifiable assets	51,748	67,149
Corporate Activity [Member]
Segment reporting
Total Revenues	305	347
Income (loss) before income tax expense (benefit)	(6,129)	(14,160)
Corporate
Segment reporting
Total Revenues	$ 305	$ 347