Stockholders' Equity and Equity Compensation (Tables)

3 Months Ended

Mar. 31, 2017

Equity [Abstract]

Summary of all stock award activity

A summary of the stock award activity is as follows:

	Quarter Ended   March 31, 2017
	Stock Awards		Weighted Average Award Date Fair Value
Outstanding at January 1, 2017	1,501,021		$	18.78
Restricted shares awarded	—		—
Restricted stock units awarded	222,895		23.09
Performance stock units awarded	213,436		23.04
Restricted shares distributed	(158,306	)	22.71
Restricted stock units distributed	(62,164	)	22.29
Performance stock units distributed	(49,672	)	21.95
Restricted shares forfeited	(1,084	)	23.01
Restricted stock units forfeited	(5,734	)	17.76
Performance stock units forfeited	(29,978	)	18.99
Outstanding at March 31, 2017	1,630,414		$	19.31

Summary of all deferred stock unit activity

A summary of deferred stock unit activity is as follows:

	Quarter Ended   March 31, 2017
	Deferred Stock Units	Weighted Average Award Date Fair Value
Outstanding at January 1, 2017	253,445	$	19.93
Awarded	3,026	24.06
Distributed	—	—
Outstanding at March 31, 2017	256,471	$	19.98

Summary of stock option activity

A summary of stock option activity is as follows:

	Quarter Ended   March 31, 2017
	Shares	Weighted Average Exercise Price
Outstanding at January 1, 2017	170,253	$	21.99
Granted	—	—
Exercised	—	—
Canceled/Expired	—	—
Outstanding at March 31, 2017	170,253	$	21.99
Exercisable at March 31, 2017	170,253	$	21.99

Financial data for stock option exercises

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

	Quarters Ended   March 31,
	2017		2016
Amount collected from stock option exercises	$	—	$	306
Total intrinsic value of stock option exercises	—		352
Tax shortfall of stock option exercises recorded in additional paid-in-capital	—		18
Aggregate intrinsic value of outstanding stock options	444		320
Aggregate intrinsic value of exercisable stock options	444		320