Loans Receivable (Schedule of Consumer Loans Forecasted Collection Percentage) (Details)		Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008	Dec. 31, 2007
Loans Originating In 2007 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Forecasted Collection Percentage	[1]	68.10%	68.10%	68.10%
Initial Forecasted Collection Percentage	[1]											70.70%
Variance In Forecasted Collection Percentage from December 31, 2014				0.00%
Variance In Initial Forecasted Collection Percentage												(2.60%)
Loans Receivable Variance In Forecasted Collection Percentage From Prior Quarter Ended			0.00%
Loans Originating In 2008 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Forecasted Collection Percentage	[1]	70.40%	70.40%	70.30%
Initial Forecasted Collection Percentage	[1]										69.70%
Variance In Forecasted Collection Percentage from December 31, 2014				0.10%
Variance In Initial Forecasted Collection Percentage											0.70%
Loans Receivable Variance In Forecasted Collection Percentage From Prior Quarter Ended			0.00%
Loans Originating In 2009 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Forecasted Collection Percentage	[1]	79.50%	79.50%	79.40%
Initial Forecasted Collection Percentage	[1]									71.90%
Variance In Forecasted Collection Percentage from December 31, 2014				0.10%
Variance In Initial Forecasted Collection Percentage										7.60%
Loans Receivable Variance In Forecasted Collection Percentage From Prior Quarter Ended			0.00%
Loans Originating In 2010 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Forecasted Collection Percentage	[1]	77.60%	77.50%	77.40%
Initial Forecasted Collection Percentage	[1]								73.60%
Variance In Forecasted Collection Percentage from December 31, 2014				0.20%
Variance In Initial Forecasted Collection Percentage									4.00%
Loans Receivable Variance In Forecasted Collection Percentage From Prior Quarter Ended			0.10%
Loans Originating In 2011 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Forecasted Collection Percentage	[1]	74.30%	74.30%	74.20%
Initial Forecasted Collection Percentage	[1]							72.50%
Variance In Forecasted Collection Percentage from December 31, 2014				0.10%
Variance In Initial Forecasted Collection Percentage								1.80%
Loans Receivable Variance In Forecasted Collection Percentage From Prior Quarter Ended			0.00%
Loans Originating In 2012 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Forecasted Collection Percentage	[1]	73.30%	73.30%	73.20%
Initial Forecasted Collection Percentage	[1]						71.40%
Variance In Forecasted Collection Percentage from December 31, 2014				0.10%
Variance In Initial Forecasted Collection Percentage							1.90%
Loans Receivable Variance In Forecasted Collection Percentage From Prior Quarter Ended			0.00%
Loans Originating In 2013 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Forecasted Collection Percentage	[1]	73.00%	73.10%	73.40%
Initial Forecasted Collection Percentage	[1]					72.00%
Variance In Forecasted Collection Percentage from December 31, 2014				(0.40%)
Variance In Initial Forecasted Collection Percentage						1.00%
Loans Receivable Variance In Forecasted Collection Percentage From Prior Quarter Ended			(0.10%)
Loans Originating In 2014 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Forecasted Collection Percentage	[1]	71.90%	72.00%	72.60%
Initial Forecasted Collection Percentage	[1]				71.80%
Variance In Forecasted Collection Percentage from December 31, 2014				(0.70%)
Variance In Initial Forecasted Collection Percentage					0.10%
Loans Receivable Variance In Forecasted Collection Percentage From Prior Quarter Ended			(0.10%)
Loans Originating In 2015 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Forecasted Collection Percentage	[1]	66.70%	67.00%	67.80%
Initial Forecasted Collection Percentage	[1]			67.70%
Variance In Forecasted Collection Percentage from December 31, 2014				(1.10%)
Variance In Initial Forecasted Collection Percentage				(1.00%)
Loans Receivable Variance In Forecasted Collection Percentage From Prior Quarter Ended			(0.30%)
Loans Originating In 2016 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Forecasted Collection Percentage	[1]	66.00%	66.50%	0.00%
Initial Forecasted Collection Percentage	[1]	65.90%
Variance In Forecasted Collection Percentage from December 31, 2014				0.00%
Variance In Initial Forecasted Collection Percentage		0.10%
Loans Receivable Variance In Forecasted Collection Percentage From Prior Quarter Ended			(0.50%)
Loans Originating In 2016 Prior Quarters [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Forecasted Collection Percentage		66.60%	66.50%
Initial Forecasted Collection Percentage			66.30%
Variance In Initial Forecasted Collection Percentage				0.30%
Loans Receivable Variance In Forecasted Collection Percentage From Prior Quarter Ended			0.10%
Loans Originating In 2016 Current Quarter [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Forecasted Collection Percentage		64.90%
Initial Forecasted Collection Percentage		65.20%
Variance In Initial Forecasted Collection Percentage				(0.30%)
Loans Receivable Variance In Forecasted Collection Percentage From Prior Quarter Ended

[1] Represents the total forecasted collections we expect to collect on the Consumer Loans as a percentage of the repayments that we were contractually owed on the Consumer Loans at the time of assignment. Contractual repayments include both principal and interest. Forecasted collection rates are negatively impacted by canceled Consumer Loans as the contractual amount owed is not removed from the denominator for purposes of computing forecasted collection rates in the table.