Supplemental Balance Sheet, Income Statement and Cash Flow Information - Reclass Accumulated Other (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Unrealized (gains) losses on available-for-sale securities that were reclassified from net income
Interest expense	$ 171,476	$ 206,274	$ 204,311
General and administrative expenses	213,559	203,515	258,731
Income (loss) from continuing operations before income taxes	(488,089)	(705,567)	(588,922)
Tax expense (benefit)	55,621	57,286	91,576
Net income (loss)	(543,690)	(762,846)	(680,510)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Unrealized (gains) losses on available-for-sale securities that were reclassified from net income
Interest expense		160	567
General and administrative expenses	208	210	217
Income (loss) from continuing operations before income taxes	(208)	(370)	(784)
Tax expense (benefit)	(48)	(141)	(190)
Net income (loss)	$ (160)	$ (229)	$ (594)