Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2014

Earnings Per Share [Abstract]

Computation of Earnings Per Common Share

A summary of the information used in the computation of earnings per common share follows (in thousands, except per share amounts):

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2014		2013		2014		2013
Numerator:
Net income to common shareholders	$	39,962	$	46,862	$	89,077	$	95,438
Net income allocated to participating securities—basic and diluted		819		880		1,900		1,782
Net income allocated to common shareholders—basic and diluted	$	39,143	$	45,982	$	87,177	$	93,656
Denominator:
Weighted average common shares—basic		81,933		83,279		82,099		84,071
Dilutive potential common shares		241		78		249		82
Weighted average common shares—diluted		82,174		83,357		82,348		84,153
Earnings per common share:
Basic	$	0.48	$	0.55	$	1.06	$	1.11
Diluted	$	0.48	$	0.55	$	1.06	$	1.11