CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Operating activities
Net income	$ 138,715	$ 91,142
Adjustments to reconcile net income to net cash used in operating activities:
Provisions for loan losses	32,176	40,173
Income tax expense	91,880	60,599
Amortization of brokered deposit placement fee	5,352	5,222
Amortization of asset-backed commercial paper upfront fee	1,202	0
Amortization of deferred loan origination costs and fees, net	1,558	847
Net amortization of discount on investments	883	236
Depreciation of premises and equipment	3,436	2,598
Amortization of acquired intangibles	740	2,275
Stock-based compensation expense	11,210	8,468
Unrealized (gains)/losses on derivative and hedging activities, net	(3,219)	8,025
Gains on sale of loans, net	(76,874)	(35,816)
Changes in operating assets and liabilities:
Net decrease in loans held for sale	55	6,183
Origination of loans held for sale	(55)	(6,183)
Increase in accrued interest receivable	(191,011)	(175,919)
Decrease (increase) in other interest-earning assets	22,023	(41,062)
Decrease in tax indemnification receivable	11,401	0
(Increase) in other assets	(25,214)	(19,182)
Decrease in income tax payable, net	(97,545)	(199,782)
Decrease in accrued interest payable	(352)	(2,931)
(Decrease) increase in payable due to entity that is a subsidiary of Navient	(6,542)	11,109
(Decrease) increase in other liabilities	(3,707)	12,140
Total adjustments	(222,603)	(323,000)
Total net cash used in operating activities	(83,888)	(231,858)
Investing activities
Loans acquired and originated	(2,070,373)	(1,921,390)
Net proceeds from sales of loans held for investment	785,481	755,746
Proceeds from claim payments	67,769	91,089
Net decrease in loans held for investment	445,610	285,496
Purchases of available-for-sale securities	(26,237)	(47,087)
Proceeds from sales and maturities of available-for-sale securities	17,936	3,712
Total net cash used in investing activities	(779,814)	(832,434)
Financing activities
Asset-backed commercial paper upfront placement fee	(104)	0
Net decrease in certificates of deposit	(140,693)	(836,822)
Net (decrease) increase in other deposits	(72,499)	763,160
Net decrease in deposits with entity that is a subsidiary of Navient	0	(5,633)
Special cash contribution from Navient	0	472,718
Net capital contributions from entity that is a subsidiary of Navient	0	15,408
Excess tax benefit from the exercise of stock-based awards	5,774	0
Preferred stock dividends paid	(9,693)	(3,228)
Net cash (used in) provided by financing activities	(217,215)	405,603
Net decrease in cash and cash equivalents	(1,080,917)	(658,689)
Cash and cash equivalents at beginning of period	2,359,780	2,182,865
Cash and cash equivalents at end of period	1,278,863	1,524,176
Cash disbursements made for:
Interest	52,789	42,819
Income taxes paid	$ 91,472	$ 199,782