Equity-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2016

Share-based Compensation [Abstract]

PSUs Eligible for Conversion to Cash

The following table provides the number of PSUs which will convert to cash for the years ending December 31:

	2016			2015			2014
Awards	Number of Units (1)	Grant Date Fair Value (in $000s)		Number of Units (2)	Grant Date Fair Value (in $000s)		Number of Units (3)	Grant Date Fair Value (in $000s)
Performance stock units	128,000	$	3,100	219,000	$	4,039	231,000	$	4,233

(1)    The participants earned 200% of target aggregating 256,000 PSUs earned. This award will convert to cash and be payable in January 2019.

(2)    The participants earned 200% of target aggregating 438,000 PSUs earned. This award will convert to cash and be payable in January 2018.

(3)    Based on the actual 2014 ROIC, no shares were earned during the performance period.

Schedule of Number of Awards and Weighted Average Grant Date Fair Value

The following table provides the number of stock unit awards granted which will convert to shares upon vesting as well as restricted shares issued during the years ended December 31, along with the weighted-average grant-date fair value of each award:

	2016			2015			2014
Awards	Number of Awards	Weighted Average Grant Date Fair Value		Number of Awards	Weighted Average Grant Date Fair Value		Number of Awards	Weighted Average Grant Date Fair Value
Deferred stock units	11,945	$	29.30	—	$	—	—	$	—
Options	—	$	—	37,500	$	25.44	—	$	—
Restricted shares	3,185	$	29.30	21,318	$	17.48	21,721	$	16.76
Restricted stock units	141,982	$	25.44	212,419	$	17.78	218,857	$	16.96
Performance stock units	—	$	—	396,714	$	19.78	—	$	—

Summary of Compensation Expense Connection with Awards

The Company recognized the following compensation expense in connection with awards that vested under the Plan and the Prior Plan along with the related tax benefits recognized during the years ended December 31 (in thousands):

	2016		2015		2014
Expense recognized under the Prior Plan	$	1,937	$	1,953	$	3,150
Expense recognized under the Plan	3,993		1,938		—
Expense recognized under the Non-Employee Directors Plan	443		—		—
Total stock compensation expense	$	6,373	$	3,891	$	3,150
Tax benefits recognized related to stock compensation expense	$	2,485	$	1,518	$	1,229

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

	2016		2015		2014
Expense recognized under the Prior Plan	$	1,937	$	1,953	$	3,150
Expense recognized under the Plan	3,993		1,938		—
Expense recognized under the Non-Employee Directors Plan	443		—		—
Total stock compensation expense	$	6,373	$	3,891	$	3,150
Tax benefits recognized related to stock compensation expense	$	2,485	$	1,518	$	1,229

The fair value of the restricted shares, restricted stock units, and performance stock units issued during the three years ended December 31, 2016

Summary of Ranges of Outstanding and Exercisable Options

The following table summarizes the ranges of outstanding and exercisable options at December 31, 2016:

Range of Exercise Prices	Options Outstanding	Weighted Average Remaining Contractual Life (in years)	Weighted Average Exercise Price		Options Exercisable	Weighted Average Exercise Price
$8.90 – $8.90	36,500	3.70	$	8.90	36,500	$	8.90
$9.74 – $9.74	95,441	4.70	$	9.74	95,441	$	9.74
$11.89 – $18.78	70,783	1.85	$	15.78	70,783	$	15.78
$20.52 – $23.78	37,000	1.69	$	22.16	37,000	$	22.16
$23.79 – $25.44	37,500	9.00	$	25.44	—	$	—
	277,224				239,724

Summary of Stock Options Transactions

The following table summarizes information about stock option transactions:

	Options		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (in years)	Aggregate Intrinsic Value
Balance at January 1, 2014	622,124		$	15.48
Exercised	(52,805	)	11.18
Balance at December 31, 2014	569,319		$	15.88
Granted	37,500		25.44
Exercised	(119,096	)	15.13
Forfeited	(750	)	9.74
Expired	(28,624	)	20.56
Balance at December 31, 2015	458,349		$	16.57
Exercised	(175,125	)	19.08
Forfeited	(6,000	)	18.22
Balance at December 31, 2016	277,224		$	14.95	4.02	$	7,401,000

Aggregate Intrinsic Value of Options Exercised and Aggregate Fair Value of Restricted Stock Units and Restricted Shares that Vested

The following table sets forth the aggregate intrinsic value of options exercised and aggregate fair value of restricted stock units and restricted shares that vested during the years ended December 31 (in thousands):

	2016		2015		2014
Aggregate intrinsic value of options exercised	$	2,439	$	1,089	$	326
Aggregate fair value of vested restricted stock units	$	4,368	$	6,578	$	2,416
Aggregate fair value of vested restricted shares	$	247	$	111	$	364
Aggregate fair value of vested deferred stock units	$	443	$	—	$	—

Summary of Information About Restricted Stock Units and Weighted Average Grant Date Fair Value

The following table summarizes information about non-vested restricted stock units and performance stock units (that will convert to shares upon vesting) and restricted shares:

	Restricted Stock Units		Weighted Average Grant Date Fair Value		Restricted Shares		Weighted Average Grant Date Fair Value		Performance Stock Units	Weighted Average Grant Date Fair Value		Deferred Stock Units (1)	Weighted Average Grant Date Fair Value
Balance at December 31, 2015	548,815		$	15.22	21,485		$	17.59	396,714	$	19.78	—	$	—
Granted	141,982		25.44		3,185		29.30		—	—		11,945	29.30
Vested	(131,369	)	15.64		(17,309	)	19.65		—	—		—	—
Forfeited	(23,264	)	16.18		—		—		—	—		—	—
Balance at December 31, 2016	536,164		$	17.79	7,361		$	17.07	396,714	$	19.78	11,945	$	29.30

Schedule of Compensation Expense Recognized from Change in Fair Value and Vesting of Performance Stock Units

The following table summarizes the compensation expense recognized from the change in fair value and vesting of performance stock units awarded for the years ended December 31 (in thousands):

	2016		2015		2014
Performance stock unit compensation expense	$	10,377	$	6,965	$	31

Cash Paid to Settle Liability Awards

The following table provides the number of restricted stock units credited to participant accounts, balance of vested and unvested restricted stock units within participant accounts, payments made with respect to restricted stock units issued under the MSPP, and MSPP expense during years ended December 31:

	2016		2015		2014
Restricted stock units credited	198,155		94,047		119,105
Restricted stock units balance, vested and unvested	646,669		519,668		647,371
Share-based liabilities paid (in thousands)	$	3,137	$	1,901	$	2,120
MSPP expense (in thousands)	$	8,565	$	2,767	$	329