Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2014

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:

	2014			2013			2012
Numerator for basic and diluted earnings per share:
Net income	$	55,588		$	84,886		$	105,933
Effect of reallocating undistributed earnings of participating securities		(376	)		(530	)		(553	)
Net income available under the two-class method	$	55,212		$	84,356		$	105,380
Denominator:
Denominator for basic earnings per share—weighted-average shares		22,946,395			22,957,013			22,968,696
Effect of dilutive potential common shares		—			—			625
Denominator for diluted earnings per share—adjusted weighted—average shares		22,946,395			22,957,013			22,969,321
Basic earnings per share	$	2.41		$	3.67		$	4.59
Diluted earnings per share	$	2.41		$	3.67		$	4.59