Schedule II - Valuation and Qualifying Accounts (Details 1) (Valuation Allowance of Deferred Tax Assets [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Valuation Allowance of Deferred Tax Assets [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Allowance, Beginning Balance	$ 24,936	$ 16,681	$ 30,036
Additions charged to income tax expense	473	2,154	93
Additions (reductions) charged to other comprehensive income	(547)	205	466
Reductions credited to income tax expense	(1,412)	(1,676)	(1,628)
Changes due to foreign currency translation	(849)	728	(521)
Divestiture	(3,728)		(11,765)
Acquisition		6,844
Allowance, Ending Balance	$ 18,873	$ 24,936	$ 16,681