Basis of Presentation and Significant Accounting Policies Narrative (Details) - USD ($)	3 Months Ended			9 Months Ended
	Sep. 30, 2017	Jun. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Gain on sale of merchant card services portfolio	$ 14,000,000		$ 0	$ 14,000,000	$ 0
Merchant Card Services Agreement [Member]
Net carrying amount of merchant card services portfolio upon sale		$ 0
Net revenue share - merchant card services	438,000
Gain on sale of merchant card services portfolio	$ 14,000,000