Equity Incentive Plans (Tables)

12 Months Ended

Dec. 31, 2015

Expected Dividend Yield- The Company has not historically declared dividends, and no future dividends are expected to be available to benefit option holders. Accordingly, the Company used an expected dividend yield of zero in the valuation model.

	Year Ended December 31,
	2015		2014		2013
Expected volatility		45.60%		41.9%		86.0%
Average expected term in years		5.4 – 6.4		3.9 – 6.6		7
Risk-free interest rate		1.60%		1.01% – 2.09%		1.7%
Expected dividend yield		0.0%		0.0%		0.0%

Service Period Stock Options

Summary of Stock Options Outstanding and Changes under Plans

Service Period Stock Options—A summary of service period stock options outstanding and changes under the plans during the year ended December 31, 2015 is presented below:

Options	Shares			Weighted Average Exercise Price		Average Remaining Contractual Term		Aggregate Intrinsic Value
Outstanding at December 31, 2012		1,095,412		$	6.82
Granted		—			—
Exercised		(7,953	)		6.28
Forfeited		(4,719	)		6.27
Outstanding at December 31, 2013		1,082,740		$	6.91
Granted		255,585			15.00
Modified from Performance Based Options to Service Period Stock Options		680,753			7.10
Exercised		—			—
Forfeited		(741	)		6.27
Outstanding at December 31, 2014		2,018,337		$	7.91
Granted		3,275			17.00
Exercised		(44,432	)		6.57
Forfeited		(370	)		15.00
Outstanding at December 31, 2015		1,976,810		$	8.00		4.8	$	2,669,203
Exercisable at December 31, 2015		1,392,598		$	7.39		4.2	$	2,097,555

Summary of Nonvested Service Period Stock Options

A summary of the nonvested service period stock options as of December 31, 2015, and changes during the year ended December 31, 2015, is presented below:

	Number of Options			Weighted-Average Grant-Date Fair Value Per Share
Nonvested as of December 31, 2013		189,234		$	6.02
Granted		255,585			6.34
Modified from Performance Based Options to Service Period Stock Options		680,753			8.90
Vested		(171,059	)		5.83
Forfeited		(741	)		6.25
Nonvested as of December 31, 2014		953,772		$	8.16
Granted		3,275			7.67
Vested		(372,464	)		8.22
Forfeited		(370	)		6.34
Nonvested as of December 31, 2015		584,213		$	8.13

Performance Based Options

Summary of Stock Options Outstanding and Changes under Plans

A summary of performance-based stock options outstanding and changes under the plans during the year ended December 31, 2015 is presented below:

Options	Shares			Weighted Average Exercise Price		Average Remaining Contractual Term		Aggregate Intrinsic Value
Outstanding at December 31, 2012		674,942		$	7.10
Granted		11,094			7.10
Forfeited		(5,283	)		7.10
Outstanding at December 31, 2013		680,753		$	7.10
Granted		255,585			15.00
Modified from Exit Event Options to Performance Based Options		657,693			7.10
Modified from Performance Based Options to Service Period Stock Options		(680,753	)		7.10
Outstanding at December 31, 2014		913,278		$	9.31
Granted		3,275			17.00
Forfeited		(370	)		15.00
Outstanding at December 31, 2015		916,183		$	9.33		6.1	$	915,225

Summary of Nonvested Service Period Stock Options

A summary of the nonvested performance-based options as of December 31, 2015, and changes during the year ended December 31, 2015, is presented below:

	Number of Options			Weighted-Average Grant-Date Fair Value Per Share
Outstanding at January 1, 2014		680,753		$	5.85
Granted		255,585			6.41
Modified from Exit Event Options to Performance Based Options		657,693			9.31
Modified from Performance Based Options to Service Period Stock Options		(680,753	)		(5.85	)
Nonvested as of December 31, 2014		913,278		$	8.50
Granted		3,275			7.64
Vested		—			—
Forfeited		(370	)		6.41
Nonvested as of December 31, 2015		916,183		$	8.50

Exit Event Options

Summary of Stock Options Outstanding and Changes under Plans

A summary of exit event stock options outstanding and changes under the plans during the year ended December 31, 2014 is presented below:

Options	Shares			Weighted Average Exercise Price	Average Remaining Contractual Term		Aggregate Instrinsic Value
Outstanding at December 31, 2012	873,508		$	7.10
Granted	5,177			7.10
Forfeited	(1,761	)		7.10
Outstanding at December 31, 2013	876,924		$	7.10
Cancelled	(219,231	)		7.10
Modified from Exit Event Options to Performance Based Options	(657,693	)		7.10
Outstanding at December 31, 2014	—		$	—	—	$	—

Summary of Nonvested Service Period Stock Options

No exit event options were granted during 2015. A summary of the nonvested exit event stock options as of December 31, 2014, and changes during the year ended December 31, 2014, is presented below:

	Number of Options			Weighted-Average Grant-Date Fair Value Per Share
Outstanding at January 1, 2014		876,924		$	5.85
Cancelled		(219,231	)		5.85
Modified from Exit Event Options to Performance Based Options		(657,693	)		5.85
Nonvested as of December 31, 2014		—		$	—