Debt (Schedule of Cash and Non-Cash Interest Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	May 14, 2021	Jan. 29, 2021	Aug. 04, 2020	Jul. 14, 2020	Feb. 04, 2020	Sep. 13, 2019	Mar. 09, 2018	Oct. 13, 2017	Apr. 17, 2017	Aug. 15, 2016	Jul. 07, 2016	Oct. 14, 2015	Oct. 15, 2014	Jul. 01, 2014	Apr. 18, 2013
Debt Instrument [Line Items]
Cash Interest	$ 352,919	$ 367,874	$ 390,036
Non-cash Interest	$ 47,085	24,870	3,193
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Interest Rates as of March 31, 2021	1.516%
Cash Interest	$ 6,414	6,070	7,085
2018 Term Loan [Member]
Debt Instrument [Line Items]
Interest Rates as of March 31, 2021	1.872%
Cash Interest	$ 44,342	68,963	105,021
Non-cash Interest	$ 45,756	23,452	1,338
Blended rate	1.86%
Accruing interest rate	1.86%
2018 Term Loan [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Blended rate	1.872%
2013-2C Tower Securities [Member]
Debt Instrument [Line Items]
Interest Rates as of March 31, 2021	3.722%																	3.722%
Cash Interest	$ 17,027	21,584	21,584
2014 Tower Securities [Member]
Debt Instrument [Line Items]
Interest Rates as of March 31, 2021	3.869%
Cash Interest	$ 24,185	24,185	43,055
2015-1C Tower Securities [Member]
Debt Instrument [Line Items]
Interest Rates as of March 31, 2021	3.156%														3.156%
Cash Interest		8,589	15,939
2016-1C Tower Securities [Member]
Debt Instrument [Line Items]
Interest Rates as of March 31, 2021	2.877%													2.877%
Cash Interest		10,972	20,361
2017-1C Tower Securities [Member]
Debt Instrument [Line Items]
Interest Rates as of March 31, 2021	3.168%											3.168%
Cash Interest	$ 9,201	24,354	24,354
2018-1C Tower Securities [Member]
Debt Instrument [Line Items]
Interest Rates as of March 31, 2021	3.448%									3.448%
Cash Interest	$ 22,281	22,281	22,281
2019-1C Tower Securities [Member]
Debt Instrument [Line Items]
Interest Rates as of March 31, 2021	2.836%								2.836%
Cash Interest	$ 33,428	33,428	10,029
2020-1C Tower Securities [Member]
Debt Instrument [Line Items]
Interest Rates as of March 31, 2021	1.884%						1.884%
Cash Interest	$ 14,391	6,675
2020-2C Tower Securities [Member]
Debt Instrument [Line Items]
Interest Rates as of March 31, 2021	2.328%						2.328%
Cash Interest	$ 14,159	6,568
2021-1C Tower Securities [Member]
Debt Instrument [Line Items]
Interest Rates as of March 31, 2021	1.631%			1.631%
Cash Interest	$ 12,255
2021-2C Tower Securities [Member]
Debt Instrument [Line Items]
Interest Rates as of March 31, 2021	1.84%
Cash Interest	$ 2,982
2021-3C Tower Securities [Member]
Debt Instrument [Line Items]
Interest Rates as of March 31, 2021	2.593%
Cash Interest	$ 4,176
2014 Senior Notes [Member]
Debt Instrument [Line Items]
Interest Rates as of March 31, 2021	4.875%																4.875%
Cash Interest		3,352	36,563
Non-cash Interest		112	800
2016 Senior Notes [Member]
Debt Instrument [Line Items]
Interest Rates as of March 31, 2021	4.875%												4.875%
Cash Interest	$ 44,092	53,625	53,625
Non-cash Interest	$ 990	1,109	1,055
2017 Senior Notes [Member]
Debt Instrument [Line Items]
Interest Rates as of March 31, 2021	4.00%										4.00%
Cash Interest	$ 2,333	30,000	30,000
2020 Senior Notes [Member]
Debt Instrument [Line Items]
Interest Rates as of March 31, 2021	3.875%							3.875%
Cash Interest	$ 58,125	46,769
Non-cash Interest	$ 339	197
2021 Senior Notes [Member]
Debt Instrument [Line Items]
Interest Rates as of March 31, 2021	3.125%				3.125%
Cash Interest	$ 43,229
Capitalized Interest And Other [Member]
Debt Instrument [Line Items]
Cash Interest	299	$ 459	$ 139
2014-1C Tower Securities [Member]
Debt Instrument [Line Items]
Interest Rates as of March 31, 2021																2.898%
Accruing interest rate		2.898%
2014-2C Tower Securities [Member]
Debt Instrument [Line Items]
Interest Rates as of March 31, 2021																3.869%
Accruing interest rate		3.869%
Interest Rate Swap [Member] | 2018 Term Loan [Member]
Debt Instrument [Line Items]
Notional amount	$ 1,950,000					$ 1,950,000
Derivative fixed interest rate	1.874%					1.874%
Interest Rate Swap [Member] | London Interbank Offered Rate (LIBOR) [Member] | 2018 Term Loan [Member]
Debt Instrument [Line Items]
Derivative basis spread on variable interest rate	1.75%					1.75%