Income Taxes Unrecognized Tax Liability (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of year	$ 9,851	$ 4,075
Additions to:
Positions taken during the current year	942	516
Positions taken during a prior year	55	6,055
Unrecognized Tax Benefits, Increases Resulting from Exchange Rate Impact	313	0
Deductions due to:
Exchange rate impact	0	(14)
Positions taken during a prior year	0	(118)
Settlements with taxing authorities	(36)	(621)
Lapse of statute of limitations	(292)	(42)
Balance at end of year	$ 10,833	$ 9,851