CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Cash Flows From Operating Activities:
Net income (loss)	$ 170,817	$ 210,676
Less: Income (loss) from discontinued operations, net of tax		(1,558)
Income (loss) from continuing operations	170,817	212,234
Adjustments to reconcile net income (loss) to net cash flows from operating activities:
Depreciation and amortization	249,220	230,170
Realized and unrealized losses (gains) on investments	1,521	(11,262)
Non-cash, stock-based compensation	9,863	10,758
Deferred tax expense (benefit)	25,088	46,568
Other, net	39,709	60,783
Changes in current assets and current liabilities	174,487	159,130
Net cash flows from operating activities from continuing operations	670,705	708,381
Net cash flows from operating activities from discontinued operations, net	(30,007)	(21,919)
Cash Flows From Investing Activities:
Purchases of marketable investment securities	(1,290,940)	(1,316,229)
Sales and maturities of marketable investment securities	1,575,374	817,230
Purchases of derivative financial instruments (Note 2)		(550,000)
Purchases of property and equipment	(287,645)	(310,933)
Change in restricted cash and marketable investment securities	765	42,956
H Block FCC license deposit (Note 10)	(1,235,866)
Other, net	36,067	(41,688)
Net cash flows from investing activities from continuing operations	(1,202,245)	(1,358,664)
Net cash flows from investing activities from discontinued operations, net, including $0 and $594 of purchases of property and equipment, respectively	20,847	(6,072)
Cash Flows From Financing Activities:
Repayment of long-term debt and capital lease obligations	(7,724)	(8,479)
Net proceeds from Class A common stock options exercised and stock issued under the Employee Stock Purchase Plan	6,014	10,887
Other	1,915	388
Net cash flows from financing activities from continuing operations	205	2,796
Net cash flows from financing activities from discontinued operations, net		(48)
Effect of exchange rates on cash and cash equivalents from discontinued operations		228
Net increase (decrease) in cash and cash equivalents from continuing operations	(531,335)	(647,487)
Cash and cash equivalents, beginning of period from continuing operations	4,700,022	3,573,742
Cash and cash equivalents, end of period from continuing operations	4,168,687	2,926,255
Net increase (decrease) in cash and cash equivalents from discontinued operations	(9,160)	(27,811)
Cash and cash equivalents, beginning of period from discontinued operations	9,160	32,398
Cash and cash equivalents, end of period from discontinued operations		$ 4,587