Defined Benefit Pension Plans Schedule of Amounts Recognized in the Consolidated Balance Sheets (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Schedule of Amounts Recognized in the Consolidated Balance Sheets [Line Items]
Plan assets in other long-term assets	$ 1,433	$ 1,426
Current portion of pension plan liability in wages and benefits payable	3,366	3,721
Long-term portion of pension plan liability	82,529	88,687
Net pension plan benefit liability	$ 84,462	$ 90,982