Business Acquisition (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2019 USD ($)
Business Acquisition Contributed Total Revenue	$ 26,800
Total consideration of transaction, net of cash acquired	276,100
Purchase accounting adjustments (1)	(1,262)
Goodwill, Acquired During Period	211,901
Business Acquisition, Purchase Price Allocation, Goodwill, Expected Tax Deductible Amount	46,000
Fax and Martech [Member]
Purchase accounting adjustments (1)	(109)
Goodwill, Acquired During Period	29,000
Digital Media Segment [Member]
Purchase accounting adjustments (1)	1,371
Goodwill, Acquired During Period	$ 1,878