Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Revenues:
Total revenues	$ 202,552	$ 307,457	$ 246,450	$ 268,772	$ 197,405	$ 216,169	$ 238,692	$ 290,098	$ 1,025,231	$ 942,364	$ 844,761
Segment operating income (loss):
Corporate activities									(9,408)	(7,682)	(6,422)
Segment operating income (loss), Total	(13,190)	31,538	7,633	1,531	(11,868)	2,981	7,080	15,719	32,454	17,694	8,334
Interest income									593	779	584
Interest expense									(1,303)	(1,511)	(1,835)
Restructuring charges	(1,431)	(608)	(678)	(2,225)	(2,232)	(75)	(1,206)	(269)	(4,942)	(3,782)	(4,222)
Impairment losses									0	0	(302)
Income from continuing operations before income taxes									26,802	13,180	2,559
U.S. [Member]
Revenues:
Total revenues									676,772	631,360	570,978
Segment operating income (loss):
Segment operating income (loss), Total									5,579	(6,269)	(15,217)
International [Member]
Revenues:
Total revenues									240,137	218,639	197,787
Segment operating income (loss):
Segment operating income (loss), Total									12,321	11,449	10,088
Intersegment eliminations [Member]
Revenues:
Total revenues									(14,869)	(9,449)	(12,281)
Marketing & Events Group [Member]
Revenues:
Total revenues									902,040	840,550	756,484
Segment operating income (loss):
Segment operating income (loss), Total									17,900	5,180	(5,129)
Restructuring charges									(3,479)	(3,756)	(3,232)
Marketing & Events International [Member]
Segment operating income (loss):
Restructuring charges									(1,373)		(448)
Travel & Recreation Group [Member]
Revenues:
Total revenues									123,191	101,814	88,277
Segment operating income (loss):
Segment operating income (loss), Total									23,962	20,196	19,885
Restructuring charges									(79)		(235)
Impairment losses											(302)
Other Segments [Member]
Segment operating income (loss):
Segment operating income (loss), Total									41,862	25,376	14,756
Corporate [Member]
Segment operating income (loss):
Restructuring charges									$ (11)	$ (26)	$ (307)