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STOCKHOLDERS' EQUITY (Tables) | 9 Months Ended
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Sep. 30, 2017
Equity [Abstract] |
Summary of Stock Option Activity | A summary of stock option activity follows:
| Stock Options (1) |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Term (years) |  | Aggregate Intrinsic Value
Outstanding, December 31, 2016 | 1,115 |  |  | $ | 6.13 |  |  |  |  |
Granted | — |  |  | $ | — |  |  |  |  |
Exercised | (91 | ) |  | $ | 10.97 |  |  |  |  |
Forfeited | (5 | ) |  | $ | 7.54 |  |  |  |  |
Outstanding, September 30, 2017 | 1,019 |  |  | $ | 5.68 |  |  | 5.5 |  | $ | 13,366 |
Exercisable, September 30, 2017 | 819 |  |  | $ | 5.00 |  |  | 4.8 |  | $ | 11,305 |
Unvested, September 30, 2017 | 240 |  |  | $ | 9.16 |  |  | 8.5 |  | $ | 2,313 |
(1) | Market-based performance stock options are included at the 100% attainment level. Attainment of the maximum performance targets and market achievements would result in the issuance of an additional 40 shares of Class A common stock currently included in unvested.
Summary of Restricted Stock, Restricted Stock Unit and Performance-based Stock Unit Activity | A summary of restricted stock, restricted stock unit and performance stock unit activity follows:
| Restricted Stock, Restricted Stock Units, and Performance Stock Units (1) |  | Weighted Average Grant Date Fair Value |  | Weighted Average Remaining Contractual Term (years) |  | Aggregate Intrinsic Value
Outstanding, December 31, 2016 | 1,099 |  |  | $ | 7.03 |  |  |  |  |
Granted | 439 |  |  | $ | 12.32 |  |  |  |  |
Class A Common Stock Vested | (376 | ) |  | $ | 5.08 |  |  |  |  |
Forfeited | (23 | ) |  | $ | 6.09 |  |  |  |  |
Outstanding, September 30, 2017 | 1,139 |  |  | $ | 9.66 |  |  | 1.5 |  | $ | 10,403 |
Unvested, September 30, 2017 | 1,501 |  |  | $ | 10.35 |  |  | 1.6 |  | $ | 12,679 |
(1) | Market-based performance stock unit grants are included at the 100% attainment level. Attainment of the maximum performance targets and market achievements would result in the issuance of an additional 362 shares of Class A common stock currently included in unvested.
Summary of Changes in Balances of Each Component of Accumulated Other Comprehensive Loss | A summary of the changes in the balances of each component of accumulated other comprehensive loss, net of tax follows:
| Marketable Securities |  | Interest Rate Swaps
Balance, December 31, 2016 | $ | (68 | ) |  | $ | — |
Other comprehensive income (loss) before reclassifications | 64 |  |  | (567 | )
Amounts reclassified from accumulated other comprehensive loss | — |  |  | 320 |
Net current-period other comprehensive income (loss) | 64 |  |  | (247 | )
Balance, September 30, 2017 | $ | (4 | ) |  | $ | (247 | )
Summary of Reclassifications Out of Accumulated Other Comprehensive Loss | A summary of reclassifications out of accumulated other comprehensive loss, net of tax follows:
|  | Three Months Ended September 30, |  | Nine Months Ended September 30, |  |
|  | 2017 |  | 2016 |  | 2017 |  | 2016 |  |
Details About Accumulated Other Comprehensive Loss Components |  | Amounts Reclassified Out of Accumulated Other Comprehensive Loss |  | Affected Line Item in the Consolidated Statements of Operations
Interest rate swaps |  | $ | 112 |  |  | $ | — |  |  | $ | 320 |  |  | $ | — |  |  | Interest expense
|  | 112 |  |  | — |  |  | 320 |  |  | — |  |  | Income (loss) before income taxes
|  | — |  |  | — |  |  | — |  |  | — |  |  | Provision for income taxes
|  | $ | 112 |  |  | $ | — |  |  | $ | 320 |  |  | $ | — |  |  | Net income (loss)

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