Earnings Per Share (Restated) (Tables)

9 Months Ended

Sep. 30, 2013

Earnings Per Share [Abstract]

Calculation of Basic and Diluted Earnings Per Share

The calculation of basic and diluted earnings per share for the three and nine-month periods ended September 30, 2013 and 2012 are as follows:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	Restated				Restated
	2013		2012		2013		2012
Net income (loss) applicable to common shares	$	119,907	$	8,244	$	161,069	$	8,586
Tax-effected interest expense attributable to convertible notes		1,485		1,808		4,409		—
Net income assuming dilution	$	121,392	$	10,052	$	165,478	$	8,586
Weighted average common shares outstanding:
Basic shares		47,159		45,664		46,592		45,511
Effect of stock-based compensation		674		422		605		295
Effect of convertible notes		11,513		13,351		11,619		—
Diluted shares		59,346		59,437		58,816		45,806
Earnings (loss) per share:
Basic	$	2.54	$	0.18	$	3.46	$	0.19
Diluted	$	2.05	$	0.17	$	2.81	$	0.19