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Supplemental Cash Flow Information - Change in Certain Working Capital Accounts (Details) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Other changes in certain working capital accounts, net    
Accounts and notes receivable $ 11,411 $ (4,420)
Income taxes receivable/payable, net (235) (3,167)
Accounts payable (1,084) (6,538)
Accrued employee compensation and benefits 611 (12,487)
Other accrued liabilities 2,596 467
Other, net (1,888) (4,899)
Total $ 11,411 $ (31,044)