Common Stock (Tables)

3 Months Ended

Mar. 31, 2017

Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

Basic and Diluted Earnings Per Share. The basic and diluted earnings per share are presented below (in thousands except for share data):
	Three Months Ended March 31,						Twelve Months Ended March 31,
	2017			2016			2017			2016
Weighted average number of common shares outstanding:
Basic number of common shares outstanding	40,387,235			40,325,324			40,366,024			40,295,316
Dilutive effect of unvested performance awards	—			—			69,665			36,824
Diluted number of common shares outstanding	40,387,235			40,325,324			40,435,689			40,332,140
Basic net income (loss) per common share:
Net income (loss)	$	(3,989	)	$	(5,808	)	$	98,587		$	72,652
Income allocated to participating restricted stock	(45		)	(32		)	(349		)	(209		)
Net income (loss) available to common shareholders	$	(4,034	)	$	(5,840	)	$	98,238		$	72,443
Diluted net income (loss) per common share:
Net income (loss)	$	(3,989	)	$	(5,808	)	$	98,587		$	72,652
Income reallocated to participating restricted stock	(45		)	(32		)	(349		)	(209		)
Net income (loss) available to common shareholders	$	(4,034	)	$	(5,840	)	$	98,238		$	72,443
Basic net income (loss) per common share:
Distributed earnings	$	0.31		$	0.295		$	1.24		$	1.18
Undistributed earnings (losses)	(0.41		)	(0.435		)	1.19			0.62
Basic net income (loss) per common share	$	(0.10	)	$	(0.140	)	$	2.43		$	1.80
Diluted net income (loss) per common share:
Distributed earnings	$	0.31		$	0.295		$	1.24		$	1.18
Undistributed earnings (losses)	(0.41		)	(0.435		)	1.19			0.62
Diluted net income (loss) per common share	$	(0.10	)	$	(0.140	)	$	2.43		$	1.80

Schedule of Antidilutive Securities Excluded From Computation Of Earnings Per Share

The amount of restricted stock awards and performance shares at 100% performance level excluded from the calculation of the diluted number of common shares outstanding because their effect was antidilutive is presented below:
	Three Months Ended		Twelve Months Ended
	March 31,		March 31,
	2017	2016	2017	2016
Restricted stock awards	78,025	59,462	58,344	54,192
Performance shares (a)	—	62,995	47,246	49,183

(a) Certain performance shares were excluded from the computation of diluted earnings per share as no payouts would have been required based upon performance at the end of each corresponding period.