Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Revenues:
Total revenues	$ 246,450	$ 238,692	$ 515,222	$ 528,790
Segment operating income (loss):
Corporate activities	(2,187)	(1,576)	(3,964)	(2,847)
Segment operating income (loss), Total	8,311	8,286	12,067	24,274
Interest income	123	176	292	390
Interest expense	(302)	(380)	(660)	(792)
Restructuring charges	678	1,206	2,903	1,475
Income before income taxes	7,454	6,876	8,796	22,397
U.S. [Member]
Revenues:
Total revenues	165,472	150,170	372,346	381,865
Segment operating income (loss):
Segment operating income (loss), Total	5,572	205	12,820	18,139
International [Member]
Revenues:
Total revenues	54,659	66,973	112,437	120,927
Segment operating income (loss):
Segment operating income (loss), Total	2,348	6,650	6,205	10,435
Intersegment eliminations [Member]
Revenues:
Total revenues	(3,190)	(2,408)	(5,798)	(3,719)
Marketing & Events Group [Member]
Revenues:
Total revenues	216,941	214,735	478,985	499,073
Segment operating income (loss):
Segment operating income (loss), Total	7,920	6,855	19,025	28,574
Restructuring charges	(484)	(1,206)	(2,487)	(1,475)
Marketing & Events International [Member]
Segment operating income (loss):
Restructuring charges	(181)		(403)
Travel & Recreation Group [Member]
Revenues:
Total revenues	29,509	23,957	36,237	29,717
Segment operating income (loss):
Segment operating income (loss), Total	2,578	3,007	(2,994)	(1,453)
Other Segments [Member]
Segment operating income (loss):
Segment operating income (loss), Total	10,498	9,862	16,031	27,121
Corporate [Member]
Segment operating income (loss):
Restructuring charges	$ (13)		$ (13)