Investments in Unconsolidated Entities (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Schedule of Equity Method Investments [Line Items]
Equity in earnings of unconsolidated entities	$ 37,360	$ 24,816	$ 99,797	$ 71,584
Equity method investments, combined income statements
Revenues	1,577,934	1,446,311	4,615,224	4,298,176
Operating expenses	1,125,966	1,063,285	3,288,743	3,150,168
Operating income	451,968	383,026	1,326,481	1,148,008
Other income, net	1,063	(51)	2,764	2,185
Net income	453,031	382,975	1,329,245	1,150,193
Los Angeles SMSA Limited Partnership
Schedule of Equity Method Investments [Line Items]
Equity in earnings of unconsolidated entities	$ 20,800	$ 18,300	$ 61,200	$ 54,600
Ownership interest in equity method investment	5.50%	5.50%	5.50%	5.50%