Merger Agreement Recognized Identifiable Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Apr. 17, 2015	Jun. 11, 2014	Jun. 30, 2015	Dec. 31, 2014
Business Combination, Consideration Transferred [Abstract]
Deferred purchase price			$ 38,127	$ 42,440
Total assets acquired
Goodwill			218,861	$ 220,554
Dounor SAS [Member]
Business Combination, Consideration Transferred [Abstract]
Total consideration	$ 60,000
Total assets acquired
Cash	1,403
Accounts receivable	12,845
Inventory	2,346
Other current assets	1,499
Total current assets	18,093
Property, plant and equipment	45,410
Goodwill	14,002
Intangible assets	16,533
Other noncurrent assets	998
Total assets acquired	95,036
Total liabilities assumed
Current liabilities	19,673
Deferred income taxes	15,352
Other noncurrent liabilities	451
Total liabilities assumed	35,476
Net assets acquired	$ 59,560
Companhia Providencia Industria e Comercio [Member]
Business Combination, Consideration Transferred [Abstract]
Cash consideration paid to selling shareholders		$ 188,117
Cash consideration deposited into escrow		8,252
Deferred purchase price		47,931	$ 38,100
Debt repaid		180,532
Total consideration		$ 424,832