Geographic Information (Revenue by Geographic Locations) (Details) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($) Reportable_Segments	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($)	Dec. 31, 2016 USD ($)
Segment Reporting [Abstract]
Number of reportable segments | Reportable_Segments			1
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net, Increase (Decrease)	$ 18,192		$ 41,042
External Revenues	92,800	$ 74,608	259,290	$ 218,248
Long-lived assets	785,158	575,732	785,158	575,732	$ 785,158
Increase (Decrease) in Deferred Income Taxes			6,327	6,250
Goodwill, Acquired During Period			127,974			$ 35,787
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
External Revenues			157,682	157,480
Long-lived assets	390,950	384,511	390,950	384,511	390,950
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net, Increase (Decrease)			1,300
External Revenues			5,969	4,653
Long-lived assets	6,674	6,736	6,674	6,736	6,674
Latin America
Revenues from External Customers and Long-Lived Assets [Line Items]
External Revenues			14,486	3,933
Long-lived assets	23,919	7,328	23,919	7,328	23,919
Long Lived Assets, Increase (Decrease)					16,600
Australia
Revenues from External Customers and Long-Lived Assets [Line Items]
External Revenues			25,091	22,869
Long-lived assets	1,273	1,256	1,273	1,256	1,273
Effect of Exchange Rate on Revenue			800
Singapore
Revenues from External Customers and Long-Lived Assets [Line Items]
External Revenues			4,493	4,384
Long-lived assets	17,427	17,505	17,427	17,505	17,427
New Zealand
Revenues from External Customers and Long-Lived Assets [Line Items]
External Revenues			1,485	1,384
Long-lived assets	251	228	251	228	251
India
Revenues from External Customers and Long-Lived Assets [Line Items]
Increase In Value Of Long Lived Assets From Continued Product Development					3,000
Revenue, Net, Increase (Decrease)			27,400
External Revenues			37,508	10,076
Long-lived assets	268,449	80,636	268,449	80,636	268,449
Long Lived Assets, Increase (Decrease)					187,800
Increase In Value Of Long Lived Assets From Business Acquisitions					179,200
Payment Of Deferred Taxes					4,200
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net, Increase (Decrease)			10,600
External Revenues			12,576	13,469
Long-lived assets	22,613	23,199	22,613	23,199	22,613
Effect of Exchange Rate on Revenue			(1,200)
Dubai [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
External Revenues			0	0
Long-lived assets	$ 53,602	$ 54,333	53,602	$ 54,333	$ 53,602
ItzCash [Member] | India
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net, Increase (Decrease)			19,500
e- governance contracts [Member] | India
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net, Increase (Decrease)			$ 8,400