Quarterly Financial Information (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2013

Quarterly Financial Information Disclosure [Abstract]

Unaudited Quarterly Financial Data

The sum of the quarterly per share amounts may not equal the annual totals due to rounding.

	2013
	First Quarter			Second Quarter			Third Quarter			Fourth Quarter
Revenues	$	222,113		$	245,183		$	221,196		$	266,070
Depreciation and amortization		32,009			29,054			27,916			27,549
Operating income (loss)		(2,244	)		28,903			19,803			29,726
Income (loss) before income taxes and discontinued operations		(12,522	)		14,584			5,783			17,970
Benefit for income taxes		66,292			1,784			12,450			12,136
Income from continuing operations		53,770			16,368			18,233			30,106
Income (loss) from discontinued operations, net of taxes		10			11			(202	)		56
Net income		53,780			16,379			18,031			30,162
Net income available to common stockholders		53,780			11,510			18,031			30,162
Net income per share		1.03			0.22			0.36			0.60
Net income per share—assuming dilution		0.81			0.18			0.30			0.48
	2012
	First Quarter			Second Quarter			Third Quarter			Fourth Quarter
Revenues	$	238,915		$	253,229		$	228,129		$	266,321
Depreciation and amortization		32,434			30,254			30,701			37,302
Operating income (loss)		21,684			31,608			(33,449	)		(24,597	)
Income (loss) before income taxes and discontinued operations		10,476			20,287			(43,253	)		(16,179	)
(Provision) benefit for income taxes		(4,469	)		(11,314	)		16,581			1,236
Income (loss) from continuing operations		6,007			8,973			(26,672	)		(14,943	)
Income (loss) from discontinued operations, net of taxes		21			(19	)		(2	)		(9	)
Net income (loss)		6,028			8,954			(26,674	)		(14,952	)
Net income (loss) available to common stockholders		6,028			8,954			(26,674	)		(14,952	)
Net income (loss) per share		0.12			0.18			(0.57	)		(0.32	)
Net income (loss) per share — assuming dilution		0.12			0.17			(0.57	)		(0.32	)