Earnings Per Common Share (Tables)

12 Months Ended

Dec. 31, 2011

Earnings Per Common Share [Abstract]

Computation Of Basic And Diluted Net Earnings Per Share

	Year ended December 31, 2011
	Income (Numerator)		Shares (Denominator)		Per-share Amount
Net income	$	38,156,000
Basic earnings per common share	$	38,156,000		66,637,000	$	.57
Effect of dilutive securities:
Options				948,000		(.01	)
Diluted earnings per common share	$	38,156,000		67,585,000	$	.56
	Year ended December 31, 2010
	Income (Numerator)		Shares (Denominator)		Per-share Amount
Net income	$	34,441,000
Basic earnings per common share	$	34,441,000		65,917,000	$	.52
Effect of dilutive securities:
Options				1,091,000		(.01	)
Diluted earnings per common share	$	34,441,000		67,008,000	$	.51
	Year ended December 31, 2009
	Income (Numerator)		Shares (Denominator)		Per-share Amount
Net income	$	30,342,000
Basic earnings per common share	$	30,342,000		65,376,000	$	.46
Effect of dilutive securities:
Options				1,053,000		—
Diluted earnings per common share	$	30,342,000		66,429,000	$	.46