Net Income Per Share (Tables)

9 Months Ended

Sep. 30, 2017

Earnings Per Share [Abstract]

Computations of Basic and Diluted Net Income Per Share

The computations of basic and diluted net income per share are as follows:

	Three Months Ended September 30,
	2017			2016
	(in thousands, except per share data)
Numerator:
Net income attributable to common stockholders (numerator for basic net income per share)	$	25,394		$	27,696
Net income allocated to participating securities	(25		)	(36		)
Numerator for basic net income per share	25,369			27,660
Dividends on Series A Preferred Stock, paid and unpaid	1,750			1,750
Dividends on Series B Preferred Stock, paid and unpaid	2,109			2,109
Numerator for diluted net income per share	$	29,228		$	31,519
Denominator:
Denominator for basic net income per share - weighted    average outstanding common shares	98,290			96,067
Dilutive effect of stock options	1,515			293
Dilutive effect of contingently issuable shares	54			—
Dilutive effect of Series A Preferred Stock	10,602			10,602
Dilutive effect of Series B Preferred Stock	16,727			16,728
Denominator for diluted net income per share	127,188			123,690
Net income per share attributable to common    stockholders - basic	$	0.26		$	0.29
Net income per share attributable to common    stockholders - diluted	$	0.23		$	0.26

	Nine Months Ended September 30,
	2017			2016
	(in thousands, except per share data)
Numerator:
Net income attributable to common stockholders (numerator for basic net income per share)	$	80,402		$	75,352
Net income allocated to participating securities	(79		)	(97		)
Numerator for basic net income per share	80,323			75,255
Dividends on Series A Preferred Stock, paid and unpaid	5,250			5,250
Dividends on Series B Preferred Stock, paid and unpaid	6,327			6,327
Numerator for diluted net income per share	$	91,900		$	86,832
Denominator:
Denominator for basic net income per share - weighted    average outstanding common shares	97,716			95,890
Dilutive effect of stock options	1,407			188
Dilutive effect of contingently issuable shares	387			—
Dilutive effect of Series A Preferred Stock	10,602			10,602
Dilutive effect of Series B Preferred Stock	16,727			16,728
Denominator for diluted net income per share	126,839			123,408
Net income per share attributable to common    stockholders - basic	$	0.82		$	0.79
Net income per share attributable to common    stockholders - diluted	$	0.72		$	0.70