Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2013

Computation of Basic and Diluted Earnings per Share under Two-Class Method

The following table sets forth the computation of basic and diluted earnings per share under the two-class method:

	2013			2012			2011
Numerator for basic and diluted earnings per share:
Net income	$	84,886		$	105,933		$	130,136
Effect of reallocating undistributed earnings of participating securities		(530	)		(553	)		(749	)
Net income available under the two-class method	$	84,356		$	105,380		$	129,387
Denominator:
Denominator for basic earnings per share—weighted-average shares		22,957,013			22,968,696			23,011,087
Effect of dilutive securities:
Employee stock options (See Note 7)		—			625			1,332
Deferred stock awards (See Note 7)		—			—			—
Dilutive potential common shares		—			625			1,332
Denominator for diluted earnings per share—adjusted weighted-average shares		22,957,013			22,969,321			23,012,419
Basic earnings per share	$	3.67		$	4.59		$	5.62
Diluted earnings per share	$	3.67		$	4.59		$	5.62