Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2013

Earnings Per Share [Abstract]

Basic and Diluted Loss Per Share

The following table shows basic and diluted EPS calculations:

	Three Months Ended June 30,						Six Months Ended June 30,
	2013			2012			2013			2012
	(Dollars in thousands, except per share amounts)
Numerator
Net income	$	224,909		$	10,638		$	247,425		$	12,903
Less: distributed earnings allocated to participating securities		—			(149	)		—			(308	)
Less: undistributed earnings allocated to participating securities		(1,867	)		—			(2,087	)		—
Net income attributable to common stockholders (numerator for basic earnings per share)		223,042			10,489			245,338			12,595
Add back: undistributed earnings allocated to participating securities		1,867			—			2,087			—
Less: undistributed earnings reallocated to participating securities		(1,849	)		—			(2,066	)		—
Numerator for diluted earnings per share under two class method	$	223,060		$	10,489		$	245,359		$	12,595
Denominator
Weighted-average common shares outstanding		48,447,005			47,398,088			48,410,486			47,367,051
Add: dilutive effect of stock options		467,979			118,170			506,502			95,493
Denominator for diluted earnings per share under two class method		48,914,984			47,516,258			48,916,988			47,462,544
Basic Earnings Per Common Share	$	4.60		$	0.22		$	5.07		$	0.27
Diluted Earnings Per Common Share	$	4.56		$	0.22		$	5.02		$	0.27