Divestiture of Disc Publishing Business (Net Income from Discontinued Operations) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income tax expense			$ (5,888)	$ (2,433)
Net income from discontinued operations, net of tax	11,559	2,445	14,365	4,689
Disc Publishing
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net revenue	0	16,689	29,922	48,255
Operating income	(97)	3,481	4,520	7,117
Gain on sale of discontinued operations	16,182	0	16,182	0
Income tax expense	4,526	1,084	6,427	2,390
Net income from discontinued operations, net of tax	$ 11,559	$ 2,445	$ 14,365	$ 4,689