Share-based Compensation and Equity (Tables)

12 Months Ended

Dec. 31, 2019

Share-based Payment Arrangement [Abstract]

Summary of Share-Based Compensation Expense

Share-based compensation expense was as follows:

For the years ended December 31,	2019		2018			2017
Continuing operations
Stock options, net of estimated forfeitures	$	3,702	$	(3,026	)	$	48,601
Restricted stock awards	8,959		12,764			13,243
Total continuing operations	$	12,661	$	9,738		$	61,844
Discontinued operations
Share-based compensation expense for discontinued operations	333		1,053			2,944
Total continuing and discontinued operations	$	12,994	$	10,791		$	64,788

Summary of Stock Options Activity

The following tables summarize the stock option activity and the assumptions used to record the related share-based compensation expense for the years ended December 31, 2019, 2018 and 2017:

	2019						2018						2017
	Options		Weighted Average Exercise Price		Aggregate Intrinsic Value		Options		Weighted Average Exercise Price		Aggregate Intrinsic Value		Options		Weighted Average Exercise Price		Aggregate Intrinsic Value
Outstanding at January 1	9,020		$	18.79	$	744	9,903		$	19.30	$	—	10,928		$	21.81	$	4,350
Granted	698		14.99				717		14.27				4,283		19.01
Exercised	(1,569	)	16.95		794		—		—		—		—		—		—
Forfeited or expired	(2,761	)	20.06				(1,600	)	19.92				(5,308	)	18.34
Outstanding at December 31	5,388		18.18		3,396		9,020		18.79		744		9,903		19.30		—
Exercisable at December 31	4,846		18.50		2,136		7,878		19.11		265		8,606		19.38		—
Vested and expected to vest	5,274		18.20		3,344		8,990		18.80		722		9,847		19.31		—

Summary of Stock Option Plans, By Exercise Price Range

	Options Outstanding		Options Exercisable		Assumption Range*
Exercise Prices	Number of Shares	Weighted Average Remaining Contractual Terms (Years)	Number of Shares	Weighted Average Remaining Contractual Terms (Years)	Risk-Free Interest Rate	Expected Terms in Years	Expected Volatility
Year Ended December 31, 2019
$13.97 - $15.55	944	7.89	524	7.06	1.81% - 3.05%	3.25 - 5.91	38.29% - 64.18%
$17.00 - $19.56	3,597	3.12	3,475	2.95	1.38% - 2.94%	2.60 - 10.00	35.20% - 58.84%
$21.00 - $21.52	330	1.09	330	1.09	0.68% - 2.61%	3.79 - 6.55	38.16% - 57.79%
$22.32 - $31.92	517	1.44	517	1.44	0.60% - 3.03%	3.18 - 6.52	36.93% - 53.80%
Year Ended December 31, 2018
$13.97 - $15.55	674	8.31	250	7.98	1.81% - 3.05%	3.25 - 5.91	49.98% - 64.18%
$17.00 - $19.56	5,730	3.69	5,013	3.50	0.49% - 2.94%	2.60 - 10.00	36.04% - 69.74%
$21.00 - $21.52	1,917	1.39	1,916	1.39	0.68% - 2.60%	2.92 - 6.52	38.16% - 69.74%
$22.32 - $31.92	699	2.53	699	2.53	0.60% - 2.93%	4.00 - 6.52	36.93% - 53.80%
Year Ended December 31, 2017
$14.58 - $19.56	6,500	4.58	5,549	4.22	0.33% - 3.31%	2.03 -10.00	32.18% - 69.74%
$21.00 - $21.28	693	2.18	347	0.66	0.43% - 3.60%	2.11 - 6.67	33.24% - 57.79%
$21.32 - $21.52	1,776	2.14	1,776	2.14	0.68% - 2.61%	3.38 - 6.55	38.16% - 69.74%
$21.68 - $22.32	221	1.94	221	1.94	0.57% - 3.03%	2.18 - 6.52	36.78% - 52.47%
$22.88 - $31.92	713	3.76	713	3.76	0.73% - 2.86%	4.00 - 6.52	39.03% - 53.80%

* The expected dividend yield is zero for all options in all years.

Summary of Non-Vested Restricted Stock And Restricted Stock Units Activity

The following table summarizes the non-vested restricted stock and restricted stock units activity for the years ended December 31, 2019, 2018 and 2017:

	2019				2018				2017
	Shares		Weighted Average Grant Date Fair Value		Shares		Weighted Average Grant Date Fair Value		Shares		Weighted Average Grant Date Fair Value
Non-vested at January 1	1,895		$	15.31	1,650		$	19.74	1,038		$	25.97
Granted	1,003		15.10		1,306		14.11		1,337		16.65
Vested	(765	)	16.18		(853	)	21.66		(328	)	22.35
Forfeited	(882	)	15.20		(208	)	17.41		(397	)	23.33
Non-vested at December 31	1,251		14.69		1,895		15.31		1,650		19.74