Segment Information Reportable Segment Information (Reconciliation of Total Segment Operating Income to Consolidated Operating Income) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Segment Reporting Information [Line Items]
Total revenues	$ 153,018	$ 127,788	$ 431,886	$ 382,766
Income (loss) from operations	46,478	39,308	132,900	124,902
Global Operating Costs	9,882	7,449	25,254	22,283
Business Cloud Services Segment [Member]
Segment Reporting Information [Line Items]
Total revenues	109,855	94,391	317,208	293,898
Direct Costs By Segment	60,841	48,504	176,609	143,075
Income (loss) from operations	49,014	45,886	140,599	150,823
Digital Media Segment [Member]
Segment Reporting Information [Line Items]
Total revenues	43,218	33,522	114,860	89,207
Direct Costs By Segment	35,872	32,652	97,305	92,845
Income (loss) from operations	7,346	871	17,555	(3,638)
Intersegment Elimination [Member]
Segment Reporting Information [Line Items]
Total revenues	(55)	(125)	(182)	(339)
Operating Segments [Member]
Segment Reporting Information [Line Items]
Income (loss) from operations	$ 56,360	$ 46,757	$ 158,154	$ 147,185