Share-Based Payments and Other Compensation (Tables)

12 Months Ended

Dec. 31, 2017

Share-Based Payments and Other Compensation

Summary of weighted-average assumptions

	2017			2016			2015
Dividend yield		—	%		—	%		—	%
Volatility rate		33.7	%		40.5	%		38.0	%
Risk-free interest rate		1.46	%		0.91	%		1.10	%
Expected life (years)		2.92			2.91			2.95
Weighted average fair value of units granted	$	19.19		$	3.37		$	5.95

Summary of stock options activity

	For the Years Ended December 31,
	2017			2016			2015
		Weighted			Weighted			Weighted
		Average			Average			Average
	Stock	Exercise Price		Stock	Exercise Price		Stock	Exercise Price
	Options	Per Share		Options	Per Share		Options	Per Share
Outstanding as of beginning of year	445,036	$	17.05	545,036	$	17.01	555,036	$	17.00
Granted	95,674		17.74	—		—	—		—
Exercised	—		—	—		—	—		—
Forfeited	—		—	(100,000)		16.80	(10,000)		16.80
Outstanding as of end of year	540,710	$	17.17	445,036	$	17.05	545,036	$	17.01
Exercisable as of end of year	468,958	$	17.09	333,777	$	17.05	272,518	$	17.01

Summary of restricted stock and stock units activity

	For the Years Ended December 31,
	2017							2016
	Performance-Based			Service-Based				Performance-Based			Service-Based
		Weighted				Weighted			Weighted				Weighted
	Number of	Average		Number of		Average		Number of	Average		Number of		Average
	Shares or	Grant Date		Shares or		Grant Date		Shares or	Grant Date		Shares or		Grant Date
	Units	Fair Value		Units	(1)	Fair Value		Units	Fair Value		Units	(1)	Fair Value
Outstanding as of beginning of year	305,543	$	4.78	157,264		$	11.75	235,746	$	8.55	116,592		$	15.57
Granted	82,349		18.32	101,644			17.31	198,174		3.37	154,176			10.43
Vested	(6,536)		15.80	(88,412)			13.56	(10,821)		15.80	(74,571)			13.26
Expired/forfeited/cancelled	(153,801)		5.64	(25,869)			12.45	(117,556)		7.38	(38,933)			11.95
Outstanding as of end of year	227,555	$	11.16	144,627		$	20.72	305,543	$	4.78	157,264		$	11.75

(1) Restricted stock shares are considered legally outstanding but are not considered outstanding for accounting purposes until the vesting conditions are satisfied in accordance with authoritative accounting guidance. Additionally, the balances do not include the restricted stock units deferred under our director deferral program discussed below.