Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2017

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

Summary of restricted share and performance share activity

A summary of restricted share activity for the six months ended June 30, 2017 is as follows:

	2017
	Time-Based				Performance-Based
	Number of Shares		Weighted Average Grant Date Fair Value		Number of Shares		Weighted Average Grant Date Fair Value
	(In whole shares)				(In whole shares)
Outstanding - beginning of year	216,916		$	36.94	165,000		$	34.78
Granted	101,670		38.42		165,000		38.10
Vested	(82,571	)	44.76		(55,000	)	34.78
Performance-based to time-based (a)	110,000		34.78		(110,000	)	34.78
Canceled or expired	(2,000	)	37.97		—		—
Outstanding - end of period	344,015		$	34.80	165,000		$	38.10

(a) During the first quarter of 2017, 55,000 of the performance-based restricted shares granted in 2016 fully vested based on the achievement of the performance criteria. In accordance with the grant agreements, the remaining 110,000 shares became time-based, vesting over the remaining two years of the requisite service period.