Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Intangible asset activity
Net balance	$ 46,549	$ 37,970
Disposals-Other	(32)
Net foreign currency translation	29	(115)
Amortization expense	(8,809)	(8,849)	$ (4,942)
Net balance	37,888	46,549	37,970
eSignLive
Intangible asset activity
Additions		17,400
Other
Intangible asset activity
Additions	151	143
Acquired Technology
Intangible asset activity
Net balance	11,392	34,632
Net foreign currency translation	16	(58)
Amortization expense	(4,462)	(4,182)
Net balance	6,946	11,392	34,632
Acquired Technology | eSignLive
Intangible asset activity
Measurement Period Adjustments - eSignLive		(19,000)
Acquired Technology | Other
Intangible asset activity
Additions	0	0
Customer Relationships
Intangible asset activity
Net balance	24,774	828
Net foreign currency translation	13	(57)
Amortization expense	(2,243)	(2,597)
Net balance	22,544	24,774	828
Customer Relationships | eSignLive
Intangible asset activity
Additions		26,600
Customer Relationships | Other
Intangible asset activity
Additions	0	0
Other
Intangible asset activity
Net balance	10,383	2,510
Disposals-Other	(32)
Net foreign currency translation		0
Amortization expense	(2,104)	(2,070)
Net balance	8,398	10,383	$ 2,510
Other | eSignLive
Intangible asset activity
Additions		9,800
Other | Other
Intangible asset activity
Additions	$ 151	$ 143