Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2016

Earnings Per Share [Abstract]

Computation of Basic and Diluted Earnings Per Common Share

The computation of basic and diluted earnings per common share is as follows:

	Year Ended December 31,
	2016			2015			2014
	(in thousands, except per share amounts)
Computation of Basic Earnings Per Share:
Numerator:
Net income from continuing operations	$	139,371		$	128,029		$	121,473
Net income from discontinued operations	—			—			1,687
Net income	139,371			128,029			123,160
Income allocated to participating securities	(975		)	(889		)	(1,075		)
Net income available to common shareholders	$	138,396		$	127,140		$	122,085
Denominator
Weighted average common shares outstanding -- basic	55,872			56,814			57,730
Basic earnings per share -- Continuing operations	$	2.48		$	2.24		$	2.08
Basic earnings per share -- Discontinued operations	—			—			0.03
	$	2.48		$	2.24		$	2.11
Computation of Diluted Earnings Per Share:
Numerator:
Net income from continuing operations	$	139,371		$	128,029		$	121,473
Net income from discontinued operations	—			—			1,687
Net income	139,371			128,029			123,160
Income allocated to participating securities	(972		)	(884		)	(1,069		)
Net income available to common shareholders	$	138,399		$	127,145		$	122,091
Denominator:
Weighted average common shares outstanding -- basic	55,872			56,814			57,730
Diluted effect of stock options and PVRSUs	283			459			526
Weighted average commons shares outstanding -- diluted	56,155			57,273			58,256
Diluted earnings per share -- Continuing operations	$	2.46		$	2.22		$	2.07
Diluted earnings per share -- Discontinued operations	—			—			0.03
	$	2.46		$	2.22		$	2.10