Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2012

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 data):

	Years Ended December 31,
	2012		2011		2010
Numerator:
Net income to common shareholders	$	151,742	$	76,759	$	52,206
Net income allocated to participating
securities - basic and diluted		1,557		866		320
Net income allocated to common
shareholders - basic and diluted	$	150,185	$	75,893	$	51,886
Denominator:
Weighted-average common shares - basic		84,767		65,590		36,876
Dilutive potential common shares		821		480		178
Weighted average common shares - diluted		85,588		66,070		37,054
Earnings per common share:
Basic	$	1.77	$	1.16	$	1.41
Diluted	$	1.75	$	1.15	$	1.40