Stockholders' Equity and Equity Compensation (Tables)

6 Months Ended

Jun. 30, 2016

Equity [Abstract]

Summary of all stock award activity

A summary of the stock award activity is as follows:

	Six Months Ended June 30, 2016
	Stock Awards		Weighted Average Award Date Fair Value
Outstanding at January 1, 2016	1,275,707		$	19.60
Restricted shares awarded	—		—
Restricted stock units awarded	316,107		18.41
Performance stock units awarded	244,937		18.35
Restricted shares distributed	(148,641	)	23.55
Restricted stock units distributed	(12,313	)	21.12
Performance stock units distributed	—		—
Restricted shares forfeited	(16,494	)	23.50
Restricted stock units forfeited	(59,210	)	17.59
Performance stock units forfeited	(51,903	)	18.50
Outstanding at June 30, 2016	1,548,190		$	18.84

Summary of all deferred stock unit activity

A summary of deferred stock unit activity is as follows:

	Six Months Ended June 30, 2016
	Deferred Stock Units		Weighted Average Award Date Fair Value
Outstanding at January 1, 2016	247,219		$	19.92
Awarded	43,782		21.26
Distributed	(18,272	)	22.33
Outstanding at June 30, 2016	272,729		$	19.91

Summary of stock option activity

A summary of stock option activity is as follows:

	Six Months Ended June 30, 2016
	Shares		Weighted Average Exercise Price
Outstanding at January 1, 2016	288,383		$	21.73
Granted	—		—
Exercised	(18,193	)	16.80
Canceled/Expired	(1,836	)	25.58
Outstanding at June 30, 2016	268,354		$	22.04
Exercisable at June 30, 2016	268,354		$	22.04

Financial data for stock option exercises

Financial data for stock option exercises are summarized as follows (in thousands):

	Six Months Ended June 30, 2016
	2016		2015
Amount collected from stock option exercises	$	306	$	1,299
Total intrinsic value of stock option exercises	47		273
Tax shortfall of stock option exercises recorded in additional paid-in-capital	293		100
Aggregate intrinsic value of outstanding stock options	149		744
Aggregate intrinsic value of exercisable stock options	149		738