Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2014

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Share-based Compensation, Stock Options, Activity

The following table summarizes the activity for stock options granted by the Company:

	Shares		Weighted-Average Exercise Price Per Share		Weighted-Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in $000s)
Outstanding at January 1, 2012	1,283,116		$	16.34	8.51	$	6,042
Granted	800,820		20.56
Exercised	(87,598	)	14.13			1,410
Forfeited or expired	(40,539	)	28.33
Outstanding at December 31, 2012	1,955,799		17.92		7.02	49,458
Granted	1,050,904		33.79
Exercised	(166,711	)	17.39			3,561
Forfeited or expired	(113,439	)	31.33
Outstanding at December 31, 2013	2,726,553		23.51		7.22	32,785
Granted	67,507		29.11
Exercised	(303,449	)	18.12			3,468
Forfeited	(126,883	)	31.24
Outstanding at December 31, 2014	2,363,728		23.95		6.34	1,223
Exercisable at December 31, 2014	1,236,543		17.40		5.22	1,223
Options expected to vest as of December 31, 2014	1,110,672		31.09		7.56	—

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions

The fair value of each stock option award was estimated at the grant date using the Black-Scholes option-pricing model. The weighted-average assumptions the Company used to value these awards are shown below.

	For the Years Ended December 31,
	2014		2013		2012
Risk-free interest rate	1.17	%	0.75	%	0.73	%
Dividend yield	—	%	—	%	0.05	%
Expected life (years)	4.00		5.00		4.50
Volatility	42.56	%	51.45	%	52.66	%
Forfeiture rate	2.20	%	3.14	%	1.40	%

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity

The following table summarizes the activity for non-vested awards granted by the Company:

	Shares		Weighted-Average Grant-Date Fair Value Per Share		Weighted-Average Contractual Term (in years)	Aggregate Intrinsic Value (in $000s)
Outstanding at January 1, 2012	1,766,960		$	15.84	5.65	$	36,240
Granted	110,783		20.72
Vested and settled	(969,815	)				20,189
Forfeited	(92,000	)	24.93
Outstanding at December 31,2012	815,928		22.32		3.09	35,101
Granted	36,576		35.79
Vested and settled	(522,762	)				20,922
Forfeited	(21,316	)	25.73
Outstanding at December 31, 2013	308,426		25.65		1.90	10,906
Granted	738,164		32.46
Vested and settled	(30,898	)	29.45			910
Forfeited	(94,133	)	8.48
Outstanding at December 31, 2014	921,559		30.42		1.84	15,215
Non-vested shares expected to vest as of December 31, 2014	901,631		30.39		1.83	14,886

Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions

The fair value of each performance-share award was estimated at the grant date using the Monte-Carlo simulation model. The weighted-average assumptions the Company used to value performance-share awards are shown below.

	For the Year Ended   December 31, 2014
Risk-free interest rate	0.82		%
Simulation period (years)	2.76
Volatility	46.58		%
Beginning TSR price	$	28.09
Forfeiture rate	2.20		%