Consolidated Statements of Income and Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statements of Income
Net Revenues	$ 2,032,140	$ 1,787,401	$ 1,568,856
Operating expenses (income):
Direct advertising expenses (exclusive of depreciation and amortization)	667,288	576,507	557,661
General and administrative expenses (exclusive of depreciation and amortization)	350,623	326,951	287,874
Corporate expenses (exclusive of depreciation and amortization)	102,500	93,577	70,944
Depreciation and amortization	349,449	271,294	251,296
Gain on disposition of assets	(15,721)	(2,115)	(9,026)
Total operating expenses	1,454,139	1,266,214	1,158,749
Operating income	578,001	521,187	410,107
Other expense (income):
Loss on extinguishment of debt	0	21,604	25,235
Interest income	(1,293)	(763)	(797)
Interest expense	127,510	106,384	137,623
Equity in earnings of investee	(4,315)	(3,384)	0
Total other expense (income)	121,902	123,841	162,061
Income before income tax expense	456,099	397,346	248,046
Income tax expense (note 12)	17,452	9,256	4,660
Net income	438,647	388,090	243,386
Preferred stock dividends	365	365	365
Net income applicable to common stock	$ 438,282	$ 387,725	$ 243,021
Earnings per share:
Basic earnings per share (in usd per share)	$ 4.32	$ 3.83	$ 2.41
Diluted earnings per share (in usd per share)	4.31	3.83	2.41
Cash dividends declared per share of common stock (in usd per share)	$ 5.00	$ 4.00	$ 2.50
Weighted average common shares used in computing earnings per share:
Weighted average number of shares outstanding basic (in shares)	101,527,778	101,133,269	100,756,361
Weighted average common shares outstanding diluted (in shares)	101,634,543	101,349,865	100,902,700
Statements of Comprehensive Income
Net income	$ 438,647	$ 388,090	$ 243,386
Other comprehensive (loss) income, net of tax
Foreign currency translation adjustments	(1,514)	(79)	249
Comprehensive income	$ 437,133	$ 388,011	$ 243,635