Goodwill and Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Goodwill, Gross
Balance, beginning of period	$ 64,858	$ 68,906
Foreign currency fluctuations	(4,411)	(4,048)
Balance, end of period	60,447	64,858	$ 68,906
Accumulated Impairment Losses
Balance, beginning of period	(46,503)	(49,977)
Foreign currency fluctuations	2,859	3,474
Balance, end of period	(43,644)	(46,503)	(49,977)
Goodwill, Net
Balance, beginning of period	18,355	18,929
Foreign currency fluctuations	(1,552)	(574)
Balance, end of period	16,803	18,355	18,929
Acquired Finite-lived Intangible Assets
Original cost	30,236	33,161
Accumulated amortization	(27,041)	(17,573)
Intangible Assets, Net	3,195	15,588
Impairment loss recorded on intangible assets	10,577
Amortization expense	1,481	2,369	$ 2,560
Estimated aggregate amortization expense of Intangible Assets
2016	407
2017	315
2018	309
2019	309
2020	309
Thereafter	1,546
Total	3,195
Customer Lists and Service Contracts
Acquired Finite-lived Intangible Assets
Original cost	19,781	21,946
Accumulated amortization	(19,232)	(12,099)
Intangible Assets, Net	$ 549	$ 9,847
Weighted-average original life (in years)	15 years	15 years
Trade Name
Acquired Finite-lived Intangible Assets
Original cost	$ 3,859	$ 4,300
Accumulated amortization	(3,859)	(2,068)
Intangible Assets, Net	$ 0	$ 2,232
Weighted-average original life (in years)	14 years	14 years
Technology
Acquired Finite-lived Intangible Assets
Original cost	$ 6,596	$ 6,915
Accumulated amortization	(3,950)	(3,406)
Intangible Assets, Net	$ 2,646	$ 3,509
Weighted-average original life (in years)	13 years	13 years