Earnings per Share (Tables)

6 Months Ended

Jun. 30, 2012

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

The following table sets forth the computation of basic and diluted earnings per share (EPS) for the three and six months ended June 30, 2012 and 2011 (in thousands, except per share amounts):

	Three Months Ended					Six Months Ended
	June 30,					June 30,
	2012			2011		2012			2011
Numerators:
Income from continuing operations, net of tax	$	36,387		$	31,145	$	58,631		$	53,267
Loss from discontinued operations, net of tax	(24		)	—		(27		)	—
Net income	$	36,363		$	31,145	$	58,604		$	53,267
Denominators:
Weighted average Class A common shares outstanding - Basic	40,614			39,903		40,487			39,695
Weighted average Class B common shares outstanding	2,112			2,218		2,139			2,311
Dilutive effect of employee stock grants	427			636		490			648
Weighted average shares - Diluted	43,153			42,757		43,116			42,654
Basic:
Earnings per common share from continuing operations	$	0.90		$	0.78	$	1.45		$	1.34
Loss per common share from discontinued operations	—			—		—			—
Earnings per common share	$	0.90		$	0.78	$	1.45		$	1.34
Diluted:
Earnings per common share from continuing operations	$	0.84		$	0.73	$	1.36		$	1.25
Loss per common share from discontinued operations	—			—		—			—
Earnings per common share	$	0.84		$	0.73	$	1.36		$	1.25

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]

The following total number of Class A common stock issuable under the assumed exercise of stock options computed based on the treasury stock method were excluded from the calculation of diluted earnings per common share, as the effect of including these shares would have been anti-dilutive (in thousands):

	Three Months Ended		Six Months Ended
	June 30,		June 30,
	2012	2011	2012	2011
Anti-dilutive shares	274	98	245	78