Derivatives Instruments Fair Value (Details) - Foreign Currency Hedge - Accounts payable and accrued liabilities - Foreign Exchange Forward - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Summary of aggregate notional amount and estimated fair value of derivative instruments
Notional	$ 136,029	$ 160,802
Fair Value	1,208	3,402
Providência Contracts | Undesignated hedges:
Summary of aggregate notional amount and estimated fair value of derivative instruments
Notional	120,444	140,623
Fair Value	1,848	3,962
Providência Instruments | Undesignated hedges:
Summary of aggregate notional amount and estimated fair value of derivative instruments
Notional	15,585	20,179
Fair Value	(640)	(560)
Hygiene Line | Undesignated hedges:
Summary of aggregate notional amount and estimated fair value of derivative instruments
Notional	0	0
Fair Value	$ 0	$ 0