Selected Quarterly Financial Data (Details) (USD $)	3 Months Ended												12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011		Sep. 30, 2011		Jun. 30, 2011		Mar. 31, 2011		Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Selected Quarterly Financial Information [Abstract]
Total revenues	$ 945,239,000	$ 905,089,000	$ 889,163,000	$ 869,791,000	$ 875,575,000		$ 821,839,000		$ 788,610,000		$ 718,553,000		$ 3,609,282,000	$ 3,204,577,000	$ 2,162,625,000
Gross profit	249,372,000	242,451,000	245,735,000	245,858,000	300,420,000		285,222,000		298,632,000		280,402,000
Net income (loss)	7,897,000	7,675,000	6,164,000	(4,584,000)	35,219,000	[1]	62,460,000	[1]	68,214,000	[1]	60,233,000	[1]	17,152,000	226,126,000	160,853,000
Basic (in dollars per share)	$ 0.14	$ 0.14	$ 0.11	$ (0.08)	$ 0.66		$ 1.19		$ 1.30		$ 1.14		$ 0.31	$ 4.28	$ 3.06
Diluted (in dollars per share)	$ 0.13	$ 0.13	$ 0.11	$ (0.08)	$ 0.64		$ 1.16		$ 1.26		$ 1.11		$ 0.29	$ 4.16	$ 2.96
Legal settlement					9,000,000
Termination benefits expense					$ 9,500,000

[1] Net income for the three months ended December 31, 2011 includes $9.0 million of expense related to a legal settlement and $9.5 million of expense related to termination benefits associated with the Company’s retraction of plans to separate and rebrand the DVD-by-mail service.