Goodwill (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Changes in the carrying amount of goodwill
Balance at the beginning of the period	$ 276,599	$ 275,504
Amount allocated to discontinued operations		(3,200)
Effect of foreign exchange rate changes	4,359	4,295
Other	756
Balance at the end of the period	281,714	276,599
International
Changes in the carrying amount of goodwill
Balance at the beginning of the period	142,918	139,723
Amount allocated to discontinued operations		(1,100)
Effect of foreign exchange rate changes	4,359	4,295
Other	756
Balance at the end of the period	148,033	142,918
North America
Changes in the carrying amount of goodwill
Balance at the beginning of the period	133,681	135,781
Amount allocated to discontinued operations		(2,100)
Effect of foreign exchange rate changes	0	0
Other	0
Balance at the end of the period	$ 133,681	$ 133,681