Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2019

Earnings Per Share [Abstract]

Summary of Basic and Diluted Earnings per Share

The following table summarizes the basic and diluted earnings per share calculations:

	Quarter ended June 30,						Six months ended June 30,
	2019			2018			2019			2018
	(in thousands except per share amounts)
Net income	$	44,233		$	36,425		$	97,760		$	64,611
Dividends on preferred shares		(6,234	)		(6,234	)		(12,469	)		(12,468	)
Effect of participating securities—share-based compensation awards		(112	)		(170	)		(305	)		(372	)
Net income attributable to common shareholders	$	37,887		$	30,021		$	84,986		$	51,771
Net income attributable to common shareholders	$	37,887		$	30,021		$	84,986		$	51,771
Interest on Exchangeable Notes, net of income taxes		2,713			2,655			5,422			5,312
Diluted net income attributable to common shareholders	$	40,600		$	32,676		$	90,408		$	57,083
Weighted average basic shares outstanding		73,425			60,903			69,051			60,844
Dilutive securities:
Shares issuable pursuant to exchange of the Exchangeable Notes		8,467			8,467			8,467			8,467
Diluted weighted average number of shares outstanding		81,892			69,370			77,518			69,311
Basic earnings per share	$	0.52		$	0.49		$	1.23		$	0.85
Diluted earnings per share	$	0.50		$	0.47		$	1.17		$	0.82

Summary of Potentially Dilutive Shares Excluded from Computation of Diluted Earnings Per Share

The following table summarizes the potentially dilutive shares excluded from the diluted earnings per share calculation:

	Quarter ended June 30,				Six months ended June 30,
	2019		2018		2019		2018
	(in thousands)
Shares issuable under share-based compensation plan		168		459		156		473