Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Segment Information
Total revenues	$ 202,005	$ 218,011
Restructuring credit (charges)	(61)	102
OPERATING INCOME FROM CONTINUING OPERATIONS	5,936	7,033
Operating segment | International
Segment Information
Total revenues	96,687	114,981
Operating income from continuing operations before restructuring charges	6,413	6,824
Operating segment | North America
Segment Information
Total revenues	105,567	103,478
Operating income from continuing operations before restructuring charges	9,996	8,472
Operating segment | Other
Segment Information
Total revenues	788	654
Operating income from continuing operations before restructuring charges	76	137
Inter-segment
Segment Information
Total revenues	(1,037)	(1,102)
Corporate expenses
Segment Information
Operating income from continuing operations before restructuring charges	(10,488)	(8,502)
Segment reconciling items
Segment Information
Operating income from continuing operations before restructuring charges	5,997	6,931
Restructuring credit (charges)	$ (61)	$ 102