Stock Based Compensation and Other Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2017

Restricted Stock Units (RSUs) [Member]

Notes Tables

Weighted-average exercise price and grant date fair value of stock options

We estimated the fair value of each performance-based restricted stock unit at the date of grant using the Monte Carlo valuation model, with the following weighted average assumptions:

	2016			2015
Risk-free interest rate	0.95		%	1.02		%
Average closing price(1)	$	4.69		$	8.96
Expected volatility	46.9		%	38.4		%
Dividend yield	—		%	—		%

(1)Average closing price of our shares over the 30-calendar days ending May 16, 2016, and May 19, 2015, respectively

Employee Stock Option [Member]

Notes Tables

Schedule of activity for stock options outstanding

The following table summarizes activity for our outstanding stock options for the year ended December 31, 2017:

	Shares		Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Life (Years)	Aggregate Intrinsic Value
Outstanding at beginning of period	4,684,839		$	7.02
Granted	—		—
Exercised	(416,017	)	5.83
Expired or canceled	(303,297	)	8.40
Outstanding at end of period	3,965,525		$	7.03	5.53	$	6,172,506
Vested or expected to vest at end of period	3,942,351		$	7.05	5.51	$	6,102,803
Options exercisable at end of period	3,010,995		$	7.60	4.70	$	3,732,798

Schedule of weighted average assumptions for fair value of options granted

We estimated the fair value of options granted on the date of grant using the Black-Scholes option-pricing model, with the following weighted average assumptions:

	2016		2015
Risk-free interest rate	1.38	%	1.57	%
Expected life of the option in years	5.22		5.22
Expected volatility	50.5	%	47.3	%
Dividend yield	—	%	—	%

Weighted-average exercise price and grant date fair value of stock options

The following table summarizes information about the weighted-average exercise price and the weighted-average grant date fair value of stock options granted:

	2016		2015
Weighted-average exercise price of the stock on the date of grant	$	4.32	$	9.00
Weighted-average grant date fair value on the date of grant	$	1.97	$	3.91

Schedule of activity for outstanding cash-settled stock appreciation rights

The following table summarizes activity for outstanding cash-settled stock appreciation rights for the year-ended December 31, 2017:

	Rights
Outstanding at beginning of period	69,500
Exercised	(25,000	)
Expired or cancelled	(1,500	)
Outstanding at end of period	43,000
Exercisable at end of period	43,000

Schedule of performance-based restricted stock units

ending TSR price is equal to the average closing price of our shares over the last 30-calendar days of the performance period as set forth in the following table:

	2016		2015
Number of performance-based restricted stock units issued, at target	230,790		136,881
Range of payout of shares for each executive	0% - 150%		0% - 150%
Performance period begin date	June 1, 2016		June 1, 2015
Performance period end date	May 31, 2019		May 31, 2018
Estimated fair value at date of grant	$	5.18	$	10.06

Schedule of activity for outstanding performance-based restricted stock units

The following table summarizes activity for outstanding performance-based restricted stock units for the year-ended December 31, 2017:

Nonvested Performance-Based Restricted Stock Units	Shares		Weighted-Average Grant Date Fair Value
Outstanding at beginning of period	447,184		$	8.06
Granted	—		—
Vested	(93,244	)	12.55
Forfeited	—		—
Outstanding at the end of period	353,940		$	6.88

Schedule of activity for outstanding time-vested restricted stock awards and restricted stock units

The following tables summarize the activity for our outstanding time-vested restricted stock awards and restricted stock units for the year ended December 31, 2017.

Nonvested Restricted Stock Awards (Time-Vesting)	Shares		Weighted-Average Grant Date Fair Value
Nonvested at January 1, 2017	595,535		$	8.45
Granted	98,714		7.80
Vested	(521,379	)	8.70
Forfeited	(4,156	)	11.20
Nonvested at December 31, 2017	168,714		$	7.24

Nonvested Restricted Stock Units (Time-Vesting)	Shares		Weighted-Average Grant Date Fair Value
Nonvested at January 1, 2017	2,183,029		$	5.82
Granted	768,661		7.83
Vested	(815,289	)	6.36
Forfeited	(145,764	)	5.72
Nonvested at December 31, 2017	1,990,637		$	6.38