STOCKHOLDERS' EQUITY (Tables)

12 Months Ended

Dec. 31, 2019

A summary of stock option activity is as follows:


	Stock Options	Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (years)	Aggregate Intrinsic Value
Outstanding, December 31, 2018	669	$	6.37
Granted	—	$	—
Exercised	(571)	$	5.88
Forfeited or expired	—	$	—

Outstanding, December 31, 2019	98	$	9.20	5.8	$	3,614
Exercisable, December 31, 2019	98	$	9.20	5.8	$	3,614

Summary of Restricted Stock, Restricted Stock Unit and Performance Stock Unit Activity

A summary of restricted stock, restricted stock unit and performance stock unit activity is as follows:


	Restricted Stock, Restricted Stock Units, and Performance Stock Units (1)	Weighted Average Grant Price		Weighted Average Remaining Contractual Term (years)	Aggregate Intrinsic Value
Outstanding, December 31, 2018	686	$	15.56
Granted	166	$	37.24
Class A common stock vested	(449)	$	12.38
Forfeited or canceled	(10)	$	23.41
Outstanding, December 31, 2019	393	$	28.23	1.3	$	6,992
Unvested, December 31, 2019	579	$	29.69	1.4	$	9,458

(1)Market-based performance stock unit grants are included at 100%. Attainment of maximum performance targets and market achievements would result in the issuance of an additional 186 shares of Class A common stock currently included in unvested. The market-based performance stock unit grants that vested in fiscal year 2019 resulted in the issuance of 178 additional shares of Class A common stock.

Accumulated Other Comprehensive Income (Loss)

The changes in the balances of each component of accumulated other comprehensive income (loss) are as follows:


	Marketable Securities		Interest Rate Swaps		Total
Balance as of December 31, 2016	$	(68)	$	—	$	(68)

Other comprehensive income (loss) before reclassifications	59		(143)		(84)
Amounts reclassified from accumulated other comprehensive income (loss)	—		421		421
Income tax expense related to items in other comprehensive income (loss)	27		(112)		(85)
Other comprehensive income, net	86		166		252
Balance as of December 31, 2017	18		166		184
Cumulative effect of new accounting principle	(18)		—		(18)
Other comprehensive loss before reclassifications	—		(1,837)		(1,837)
Amounts reclassified from accumulated other comprehensive loss	—		363		363

Other comprehensive loss	—		(1,474)		(1,474)
Balance as of December 31, 2018	—		(1,308)		(1,308)

Other comprehensive loss before reclassifications	—		(5,286)		(5,286)
Amounts reclassified from accumulated other comprehensive loss	—		553		553

Other comprehensive loss	—		(4,733)		(4,733)
Balance as of December 31, 2019	$	—	$	(6,041)	$	(6,041)

Reclassification Out of Accumulated Other Comprehensive Income (Loss)

A summary of reclassifications out of accumulated other comprehensive income (loss) for fiscal years 2019, 2018 and 2017 is as follows:


	Fiscal Year Ended December 31,
	2019		2018		2017
Details About Accumulated Other Comprehensive Income (Loss) Components	Amounts Reclassified Out of Accumulated Other Comprehensive Income (Loss)							Affected Line Item in the Consolidated Statements of Operations
Interest rate swaps	$	553	$	363	$	421	Interest expense
	553		363		421		Income (loss) before income taxes
	—		—		—		Benefit for income taxes
	$	553	$	363	$	421	Net income (loss)