Income Taxes Unrecognized Tax Benefits (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Contingency [Line Items]
Unrecognized tax benefits	$ 26,433	$ 28,482	$ 44,049
Gross increase to positions in prior years	2,154	299	2,132
Gross decrease to positions in prior years	(536)	(51)	(16,603)
Gross increases to current period tax positions	1,670	3,347	1,866
Audit settlements	0	(27)	0
Decrease related to lapsing of statute of limitations	(817)	(5,769)	(2,888)
Effect of change in exchange rates	(289)	152	(74)
The amount of unrecognized tax benefits that, if recognized, would affect our effective tax rate	27,694	25,852	28,196
Net interest and penalties expense (benefit)	(898)	(414)	(795)
Accrued interest	2,078	3,095
Accrued penalties	3,075	3,030
Unrecognized tax benefits	$ 28,615	$ 26,433	$ 28,482