Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2015

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

Summary of the transactions pursuant to the stock option plans

A summary of the status of the stock option plans as of December 31, 2015, and changes during the years ended December 31, 2015, 2014 and 2013, are presented below:

	Number of Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value
Outstanding at December 31, 2012	7,101		$	5.75
Granted	—		n/a
Exercised	—		n/a
Expired	—		n/a
Outstanding at December 31, 2013	7,101		$	5.75
Granted	—		n/a
Exercised	—		n/a
Expired	—		n/a
Outstanding at December 31, 2014	7,101		$	5.75
Granted	—		n/a
Exercised	(7,101	)	5.75
Expired	—		n/a
Vested and Exercisable at December 31, 2015	—		$	—	—	$	—

Summary of the status of the restricted stock units and changes during the period

A summary of the status of the restricted stock units as of December 31, 2015, and changes during the year ended December 31, 2015, 2014 and 2013, are presented below:

	Shares		Weighted Average Grant-Date Fair Value
Nonvested at December 31, 2012	723,425		$	19.78
Issued	72,291		20.40
Vested	(90,965	)	21.84
Forfeited	—		n/a
Nonvested at December 31, 2013	704,751		$	20.00
Issued	31,099		22.20
Vested	(145,421	)	22.41
Forfeited	(34,729	)	23.88
Nonvested at December 31, 2014	555,700		$	19.57
Issued	12,589		23.65
Vested	(150,073	)	20.77
Forfeited	(16,500	)	19.45
Nonvested at December 31, 2015	401,716		$	19.25

Summary of the status of the performance stock units and changes during the period

A summary of the status of the performance share units as of December 31, 2015, and changes during the year ended December 31, 2015 and 2014 are presented below:

	Shares		Weighted Average Grant-Date Fair Value
Nonvested at December 31, 2013	—		n/a
Issued	89,117		18.96
Vested	(9,687	)	18.96
Forfeited	—		n/a
Nonvested at December 31, 2014	79,430		18.96
Issued	125,392		21.64
Vested	(6,915	)	19.91
Forfeited	(24,056	)	20.60
Nonvested at December 31, 2015	173,851		$	20.63