CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Operating activities
Net income	$ 126,254	$ 94,943
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Provisions for credit losses	53,931	25,296
Income tax expense	40,997	51,011
Amortization of brokered deposit placement fee	2,789	2,130
Amortization of ABCP Facility upfront fee	301	352
Amortization of deferred loan origination costs and loan premium/(discounts), net	2,607	1,777
Net amortization of discount on investments	475	452
Income on tax indemnification receivable	(1,231)	(1,501)
Depreciation of premises and equipment	3,117	2,585
Amortization of acquired intangibles	92	117
Stock-based compensation expense	14,745	9,425
Unrealized (gains) losses on derivatives and hedging activities, net	(3,879)	5,364
Other adjustments to net income, net	1,763	1,258
Changes in operating assets and liabilities:
Increase in accrued interest receivable	(201,776)	(153,055)
Increase in other interest-earning assets	(10,051)	(1,228)
Increase in other assets	(35,716)	(13,435)
Decrease in income taxes payable, net	(1,159)	(1,689)
Increase in accrued interest payable	11,034	6,146
Increase in payable due to entity that is a subsidiary of Navient	422	227
Decrease in other liabilities	(18,873)	(39,424)
Total adjustments	(140,412)	(104,192)
Total net cash used in operating activities	(14,158)	(9,249)
Investing activities
Loans acquired and originated	(2,300,135)	(1,892,697)
Net proceeds from sales of loans held for investment	820	1,972
Proceeds from claim payments	12,084	11,932
Net decrease in loans held for investment	735,894	506,637
Purchases of available-for-sale securities	0	(18,481)
Proceeds from sales and maturities of available-for-sale securities	10,371	8,170
Total net cash used in investing activities	(1,540,966)	(1,382,467)
Financing activities
Brokered deposit placement fee	(7,055)	(2,084)
Net increase (decrease) in certificates of deposit	694,982	(151,003)
Net increase in other deposits	323,614	83,018
Borrowings collateralized by loans in securitization trusts - issued	667,848	767,994
Borrowings collateralized by loans in securitization trusts - repaid	(200,247)	(99,884)
Issuance costs for unsecured debt offering	0	(23)
Borrowings under ABCP Facility	300,000	0
Repayment of borrowings under ABCP Facility	(300,000)	0
Fees paid on ABCP Facility	(1,063)	(1,515)
Preferred stock dividends paid	(3,397)	(5,575)
Net cash provided by financing activities	1,474,682	590,928
Net decrease in cash, cash equivalents and restricted cash	(80,442)	(800,788)
Cash, cash equivalents and restricted cash at beginning of period	1,636,175	1,972,510
Cash, cash equivalents and restricted cash at beginning of period	1,555,733	1,171,722
Cash disbursements made for:
Interest	94,737	54,648
Income taxes paid	1,894	1,426
Income taxes refunded	(990)	(32)
Reconciliation of the Consolidated Statements of Cash Flows to the Consolidated Balance Sheets
Total cash, cash equivalents and restricted cash	$ 1,636,175	$ 1,972,510