Earnings Per Share (Tables)

9 Months Ended

Sep. 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				Nine Months Ended
	September 30,				September 30,
	2014		2013		2014		2013
Numerator:
Net income to common shareholders	$	46,553	$	33,202	$	135,630	$	128,640
Net income allocated to participating securities - basic and diluted		883		616		2,783		2,398
Net income allocated to common shareholders - basic and diluted	$	45,670	$	32,586	$	132,847	$	126,242
Denominator:
Weighted average common shares - basic		81,721		82,091		81,965		83,404
Dilutive potential common shares		221		114		239		92
Weighted average common shares - diluted		81,942		82,205		82,204		83,496
Earnings per common share:
Basic	$	0.56	$	0.40	$	1.62	$	1.51
Diluted	$	0.56	$	0.40	$	1.62	$	1.51