Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2013

Earnings Per Share [Abstract]

Computations of Basic and Diluted Earnings Per Share

The computations of basic and diluted EPS are set forth below:

	For the Three Months Ended March 31,
	2013		2012
	(in thousands, except per share  amounts, unaudited)
Numerator for basic and diluted EPS — net income allocated to common stockholders	$	13,618	$	16,136
Denominator for basic EPS — weighted average number of shares	30,172		30,523
Add — dilutive effect of:
Weighted average number of incremental shares issuable from restricted stock units	89		9
Denominator for diluted EPS — weighted average number of shares and dilutive potential shares	30,261		30,532
Earnings per share:
Basic	$	0.45	$	0.53
Diluted	$	0.45	$	0.53