Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2013

Earnings Per Share [Abstract]

Calculation of Basic and Diluted Weighted Average Shares Outstanding Earnings Per Share

The following table sets forth the calculation of basic and diluted weighted average shares outstanding and earnings per share for the indicated periods.

	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013			2012
	(In thousands, except per share amounts)
Income (numerator):
Basic:
Net income	$	36,102		$	23,659		$	115,882		$	105,180
Net income attributable to participating securities		(924	)		(564	)		(2,728	)		(2,283	)
Net income attributable to common stock—basic	$	35,178		$	23,095		$	113,154		$	102,897
Diluted:
Net income	$	36,102		$	23,659		$	115,882		$	105,180
Net income attributable to participating securities		(923	)		(563	)		(2,726	)		(2,281	)
Net income attributable to common stock—diluted	$	35,179		$	23,096		$	113,156		$	102,899
Weighted average shares (denominator):
Weighted average shares—basic		48,732			48,342			48,680			48,300
Dilutive effect of stock options		44			42			40			43
Weighted average shares—diluted		48,776			48,384			48,720			48,343
Basic earnings per share	$	0.72		$	0.48		$	2.32		$	2.13
Diluted earnings per share	$	0.72		$	0.48		$	2.32		$	2.13