Other Investments - Financial Information for Equity Method Investments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Deluxe
Related Party Transaction [Line Items]
Revenue from related parties	$ 1,026	$ 877	$ 2,281	$ 1,754
Due to related parties		680		680	$ 631
Broadband Connectivity Solutions
Related Party Transaction [Line Items]
Revenue from related parties	2,784	$ 2,262	4,453	$ 4,546
Due to related parties	$ 5,725		$ 5,725		$ 5,171