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Fair Value Measurements
12 Months Ended
Dec. 31, 2020
Fair Value Disclosures [Abstract]  
Fair Value Measurements Fair Value Measurements
We use estimates of fair value in applying various accounting standards for the consolidated financial statements.

We categorize our fair value estimates based on a hierarchal framework associated with three levels of price transparency utilized in measuring financial instruments at fair value. For additional information regarding our policies for determining fair value and the hierarchical framework, see Note 2, “Significant Accounting Policies — Fair Value Measurement.”

The following table summarizes the valuation of our financial instruments that are marked-to-fair value on a recurring basis.
 
 Fair Value Measurements on a Recurring Basis
 December 31, 2020December 31, 2019
Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total 
Assets
Trading investments$— $— $16,923 $16,923 $— $— $— $— 
Available-for-sale investments— 1,996,634 — 1,996,634 — 487,669 — 487,669 
Derivative instruments— 729 — 729 — 715 — 715 
Total$— $1,997,363 $16,923 $2,014,286 $— $488,384 $— $488,384 
Liabilities
Derivative instruments$— $(287)$— $(287)$— $(1,164)$— $(1,164)
Total$— $(287)$— $(287)$— $(1,164)$— $(1,164)
The following table summarizes the fair values of our financial assets and liabilities, including derivative financial instruments.

 December 31, 2020December 31, 2019
Fair
Value
Carrying
Value
DifferenceFair
Value
Carrying
Value
Difference
Earning assets:
Loans held for investment, net:
   Private Education Loans$22,124,171 $18,436,968 $3,687,203 $24,988,941 $22,896,515 $2,092,426 
   FFELP Loans748,657 735,208 13,449 795,055 783,816 11,239 
   Personal Loans— — — 1,047,119 983,643 63,476 
Credit Cards12,249 10,967 1,282 3,818 3,818 — 
Loans held for sale3,226,029 2,885,640 340,389 — — — 
Cash and cash equivalents4,455,292 4,455,292 — 5,563,877 5,563,877 — 
Trading investments16,923 16,923 — — — — 
Available-for-sale investments1,996,634 1,996,634 — 487,669 487,669 — 
Accrued interest receivable1,527,816 1,387,305 140,511 1,491,471 1,392,725 98,746 
Tax indemnification receivable18,492 18,492 — 27,558 27,558 — 
Derivative instruments729 729 — 715 715 — 
Total earning assets$34,126,992 $29,944,158 $4,182,834 $34,406,223 $32,140,336 $2,265,887 
Interest-bearing liabilities:
Money-market and savings accounts$11,136,560 $11,067,633 $(68,927)$10,363,691 $10,335,163 $(28,528)
Certificates of deposit11,799,223 11,597,266 (201,957)14,065,007 13,947,743 (117,264)
Short-term borrowings— — — 289,230 289,230 — 
Long-term borrowings5,398,309 5,189,217 (209,092)4,434,323 4,354,037 (80,286)
Accrued interest payable60,272 60,272 — 75,158 75,158 — 
Derivative instruments287 287 — 1,164 1,164 — 
Total interest-bearing liabilities$28,394,651 $27,914,675 $(479,976)$29,228,573 $29,002,495 $(226,078)
Excess of net asset fair value over carrying value$3,702,858 $2,039,809 

The methods and assumptions used to estimate the fair value of each class of financial instruments are as follows:
Cash and Cash Equivalents
Cash and cash equivalents are carried at cost. Carrying value approximated fair value for disclosure purposes. These are level 1 valuations.
Investments
Trading
Investments classified as trading are carried at fair value in the consolidated financial statements. As such, these are level 3 valuations.
Available-for-Sale
Investments classified as available-for-sale are carried at fair value in the consolidated financial statements. Investments in mortgage-backed securities, U.S. government-sponsored enterprises and Treasury securities and Utah Housing Corporation bonds are valued using observable market prices of similar assets. As such, these are level 2 valuations.
Loans Held For Investment and Accrued Interest Receivable
Private Education Loans
For Private Education Loans, fair value was determined by using observable quoted prices for similar assets in our most recent market transactions. Adjustments were then made to account for the value of loans in our portfolio that have materially different characteristics than those included in the most recent market transaction. These are considered level 2 valuations. A portion of the fair value that has been modeled is attributable to accrued interest receivable that has not yet been capitalized, and has been allocated to the accrued interest receivable line item. The remaining accrued interest receivable that will not be capitalized into the principal balance of the loan is carried at cost.
FFELP Loans, Personal Loans, and Credit Cards
For FFELP Loans, Personal Loans and Credit Cards, the fair value was determined by modeling expected loan level cash flows using stated terms of the assets and internally developed assumptions to determine aggregate portfolio yield, net present value and average life. The significant assumptions used to determine fair value are prepayment speeds, default rates, cost of funds and required return on equity. Significant inputs into the model are not observable. However, we do calibrate the model based on market transactions when appropriate.  As such, these are level 3 valuations. 
Loans Held For Sale
Our loans held for sale are accounted for at the lower of cost or market. The fair value was determined by using observable quoted prices for similar assets in our most recent market transactions. These are considered level 2 valuations.
Tax Indemnification Receivable
Tax indemnification receivable is carried at cost. The carrying value approximates fair value. This is a level 2 valuation.
Money Market and Savings Accounts
Some of our MMDAs are fixed-rate deposits that are subject to minimum balances for a specified period of time. The fair values of these deposits are estimated using discounted cash flows based on rates currently offered for deposits of similar maturities. These are level 2 valuations. The fair values of our remaining money market and savings accounts equal the amounts payable on demand at the balance sheet date and are reported at their carrying value. These are level 1 valuations.
Certificates of Deposit
The fair values of CDs are estimated using discounted cash flows based on rates currently offered for deposits of similar remaining maturities. These are level 2 valuations.
Accrued Interest Payable
Accrued interest payable is carried at cost. The carrying value approximates fair value due to its short-term nature. This is a level 1 valuation.
Borrowings
Borrowings are accounted for at cost in the consolidated financial statements. The carrying value of short-term borrowings approximated fair value for disclosure purposes, due to the short-term nature of those borrowings. This is a level 1 valuation. The fair value of long-term borrowings is estimated using current market prices. This is a level 2 valuation.
Derivatives
All derivatives are accounted for at fair value in the consolidated financial statements. The fair value of derivative financial instruments was determined by a standard derivative pricing and option model using the stated terms of the contracts and observable market inputs. It is our policy to compare the derivative fair values to those received from our counterparties in order to evaluate the model’s outputs.
When determining the fair value of derivatives, we take into account counterparty credit risk for positions where we are exposed to the counterparty on a net basis by assessing exposure net of collateral held. When the counterparty has exposure to us under derivative contracts with the Company, we fully collateralize the exposure (subject to certain thresholds).
Interest rate swaps are valued using a standard derivative cash flow model with a LIBOR swap yield curve, which is an observable input from an active market. These derivatives are level 2 fair value estimates in the hierarchy.
The carrying value of borrowings designated as the hedged item in a fair value hedge is adjusted for changes in fair value due to changes in the benchmark interest rate (one-month LIBOR). These valuations are determined through standard pricing models using the stated terms of the borrowings and observable yield curves.