Segment Information Reportable Segment Information (Total Assets, Capital Expenditures, Depreciation And Amortization) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total assets	$ 1,764,999		$ 1,764,999		$ 1,705,202
Property, Plant and Equipment, Additions			11,927	$ 7,755
Depreciation, Depletion and Amortization, Nonproduction	20,455	$ 14,851	63,635	43,307
Business Cloud Services Segment [Member]
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total assets	1,000,638		1,000,638		883,587
Property, Plant and Equipment, Additions			6,078	4,366
Depreciation, Depletion and Amortization, Nonproduction	12,961	9,413	41,733	27,471
Digital Media Segment [Member]
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total assets	403,708		403,708		378,381
Property, Plant and Equipment, Additions			5,528	3,066
Depreciation, Depletion and Amortization, Nonproduction	7,280	5,250	21,303	15,273
Operating Segments [Member]
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total assets	1,404,346		1,404,346		1,261,968
Property, Plant and Equipment, Additions			11,606	7,432
Depreciation, Depletion and Amortization, Nonproduction	20,241	14,663	63,036	42,744
Corporate [Member]
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total assets	360,653		360,653		$ 443,234
Property, Plant and Equipment, Additions			321	323
Depreciation, Depletion and Amortization, Nonproduction	$ 214	$ 188	$ 599	$ 563