Common Stock (Tables)

3 Months Ended

Mar. 31, 2019

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,
	2019			2018			2019			2018
Weighted average number of common shares outstanding:
Basic number of common shares outstanding	40,582,936			40,491,194			40,543,986			40,440,189
Dilutive effect of unvested performance awards	80,817			—			117,242			123,436
Diluted number of common shares outstanding	40,663,753			40,491,194			40,661,228			40,563,625
Basic net income (loss) per common share:
Net income (loss)	$	6,089		$	(6,966	)	$	97,370		$	95,285
Income allocated to participating restricted stock	(47		)	(48		)	(340		)	(353		)
Net income (loss) available to common shareholders	$	6,042		$	(7,014	)	$	97,030		$	94,932
Diluted net income (loss) per common share:
Net income (loss)	$	6,089		$	(6,966	)	$	97,370		$	95,285
Income reallocated to participating restricted stock	(47		)	(48		)	(339		)	(353		)
Net income (loss) available to common shareholders	$	6,042		$	(7,014	)	$	97,031		$	94,932
Basic net income (loss) per common share:
Distributed earnings	$	0.36		$	0.335		$	1.44		$	1.34
Undistributed earnings (losses)	(0.21		)	(0.505		)	0.95			1.01
Basic net income (loss) per common share	$	0.15		$	(0.170	)	$	2.39		$	2.35
Diluted net income (loss) per common share:
Distributed earnings	$	0.36		$	0.335		$	1.44		$	1.34
Undistributed earnings (losses)	(0.21		)	(0.505		)	0.95			1.00
Diluted net income (loss) per common share	$	0.15		$	(0.170	)	$	2.39		$	2.34

Schedule of Antidilutive Securities Excluded From Computation Of Earnings Per Share

The number 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,
	2019	2018	2019	2018
Restricted stock awards	62,605	72,218	60,432	66,288
Performance shares (a)	43,652	45,977	22,234	11,494

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(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.