Goodwill and Other Intangible Assets (Schedule of Changes in Intangible Assets and Goodwill) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2017	Dec. 31, 2016
Amortized intangible assets:
Gross carrying value			$ 71,901	$ 71,901
Accumulated amortization			7,216	5,447
Net carrying amount	$ 64,685	$ 66,454	64,685	66,454
Beginning balance	66,454
Amortization	(1,769)
Currency Translation
Ending balance	64,685	66,454
Goodwill
Gross carrying value			160,375
Beginning balance	160,375
Amortization
Currency Translation	714
Ending balance	161,089	160,375
AEC Trade Names [Member]
Amortized intangible assets:
Gross carrying value			43	43
Accumulated amortization			24	23
Net carrying amount	20	20	19	20
Beginning balance	20
Amortization	(1)
Currency Translation
Ending balance	$ 19	$ 20
Goodwill
Amortization life in years	15 years	15 years
AEC Technology [Member]
Amortized intangible assets:
Gross carrying value			228	228
Accumulated amortization			130	124
Net carrying amount	$ 104	$ 104	98	104
Beginning balance	104
Amortization	(6)
Currency Translation
Ending balance	$ 98	$ 104
Goodwill
Amortization life in years	15 years	15 years
Customer Relationships [Member]
Amortized intangible assets:
Gross carrying value			49,490	49,490
Accumulated amortization			3,306	2,481
Net carrying amount	$ 46,184	$ 47,009	46,184	47,009
Beginning balance	47,009
Amortization	(825)
Currency Translation
Ending balance	$ 46,184	$ 47,009
Goodwill
Amortization life in years	15 years	15 years
Customer Contracts [Member]
Amortized intangible assets:
Gross carrying value			20,420	20,420
Accumulated amortization			3,412	2,561
Net carrying amount	$ 17,008	$ 17,859	17,008	17,859
Beginning balance	17,859
Amortization	(851)
Currency Translation
Ending balance	$ 17,008	$ 17,859
Goodwill
Amortization life in years	6 years	6 years
Other Intangible Assets [Member]
Amortized intangible assets:
Gross carrying value			1,720	1,720
Accumulated amortization			344	258
Net carrying amount	$ 1,376	$ 1,462	1,376	$ 1,462
Beginning balance	1,462
Amortization	(86)
Currency Translation
Ending balance	$ 1,376	$ 1,462
Goodwill
Amortization life in years	5 years	5 years
MC Goodwill [Member]
Goodwill
Gross carrying value			64,645
Beginning balance	$ 64,645
Amortization
Currency Translation	714
Ending balance	65,359	$ 64,645
AEC Goodwill [Member]
Goodwill
Gross carrying value			$ 95,730
Beginning balance	95,730
Amortization
Currency Translation
Ending balance	$ 95,370	$ 95,730