Business Acquisition (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2018 USD ($)
Business Acquisition Contributed Total Revenue	$ 11,700
Total consideration of transaction, net of cash acquired	101,000
Purchase accounting adjustments (1)	(1,442)
Goodwill, Acquired During Period	71,402
Business Acquisition, Purchase Price Allocation, Goodwill, Expected Tax Deductible Amount	13,900
Business Cloud Services Segment [Member]
Purchase accounting adjustments (1)	(1,014)
Goodwill, Acquired During Period	66,709
Digital Media Segment [Member]
Purchase accounting adjustments (1)	(428)
Goodwill, Acquired During Period	$ 4,693