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STOCKHOLDERS' EQUITY (Tables)
 6 Months Ended
Jun. 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
(78
)
 
$
11.01

 
 
 
 
Forfeited
(2
)
 
$
4.06

 
 
 
 
Outstanding, June 30, 2017
1,035

 
$
5.76

 
5.7
 
$
11,020

Exercisable, June 30, 2017
702

 
$
5.15

 
4.6
 
$
7,897

Unvested, June 30, 2017
373

 
$
7.62

 
8.2
 
$
3,280

(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
438

 
$
12.32

 
 
 
 
Class A Common Stock Vested
(370
)
 
$
5.07

 
 
 
 
Forfeited
(18
)
 
$
5.99

 
 
 
 
Outstanding, June 30, 2017
1,149

 
$
9.63

 
1.8
 
$
7,784

Unvested, June 30, 2017
1,512

 
$
10.32

 
1.9
 
$
9,190

(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 363 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
46

 
(472
)
Amounts reclassified from accumulated other comprehensive income (loss)
—

 
208

Net current-period other comprehensive income (loss)
46

 
(264
)
Balance, June 30, 2017
$
(22
)
 
$
(264
)
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
June 30,
 
Six Months Ended
June 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
 
$
138

 
$
—

 
$
208

 
$
—

 
Interest expense
 
 
138

 
—

 
208

 
—

 
(Loss) income before income taxes
 
 
—

 
—

 
—

 
—

 
Provision for income taxes
 
 
$
138

 
$
—

 
$
208

 
$
—

 
Net (loss) income