Business Acquisition (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019 USD ($)
Business Acquisition Contributed Total Revenue	$ 68,300
Total consideration of transaction, net of cash acquired	425,800
Purchase accounting adjustments (1)	(912)
Goodwill, Acquired During Period	254,807
Business Acquisition, Purchase Price Allocation, Goodwill, Expected Tax Deductible Amount	93,800
Fax and Martech [Member]
Purchase accounting adjustments (1)	177
Goodwill, Acquired During Period	31,655
Digital Media Segment [Member]
Purchase accounting adjustments (1)	(1,089)
Goodwill, Acquired During Period	$ 43,208