Summary of Significant Accounting Policies (Narrative) (Details) - USD ($)		12 Months Ended
	Nov. 29, 2012	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2011
Accounting Policies [Line Items]
Other than temporary impairment charges		$ 0	$ 0	$ 20,000
Amortization of intangible assets		1,186,000	1,211,000	1,142,000
Advertising costs		$ 387,000	$ 621,000	$ 706,000
Common stock options (in shares)		619,250	505,250	13,000
Minimum exercisable prices (in dollars per share)		$ 9.58	$ 9.82	$ 20.98
Maximum exercisable prices (in dollars per share)		$ 25.43	$ 25.43	$ 25.43
Restricted cash and cash equivalents		$ 266,800,000	$ 280,400,000
Acquired software and personnel of a prepaid program manager	$ 1,800,000
Gross Carrying Amount		13,823,000	$ 13,823,000
Amortization expense per year		$ 1,189,000
Number of stock repurchased under, Stock repurchase program (in shares)		100,000	100,000		100,000
Maximum number of shares authorized (in shares)					750,000
Purchase of treasury shares (in shares)		0	0	0	100,000
Health savings account portfolio, amount transferred to purchaser		$ 400,000,000
Average cost of repurchased stock (in dollars per share)					$ 8.66
Internal Use Software [Member]
Accounting Policies [Line Items]
Estimated useful life		7 years
Total capitalized software costs		$ 5,200,000	$ 5,400,000
Amortization of intangible assets		$ 1,200,000	1,200,000	$ 907,000
Fraud Monitoring Software [Member]
Accounting Policies [Line Items]
Estimated useful life		8 years
Customer List Intangible [Member]
Accounting Policies [Line Items]
Estimated useful life		12 years
Gross Carrying Amount		$ 12,006,000	12,006,000
Amortization expense per year		1,000,000
Amortization expense over next five years		4,000,000
Fair Value, Measurements, Recurring [Member]
Accounting Policies [Line Items]
Loans held for sale		$ 489,938,000	$ 217,080,000