Item 6. Selected Financial Data

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Our selected consolidated financial data for the periods presented should be read in conjunction with “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations” and the consolidated financial statements and notes thereto provided under Part II, Item 8. “Financial Statements and Supplementary Data” of this Annual Report on Form 10-K.

	For the Years Ended
	December 31,			December 31,			December 31,			December 31,			December 31,
		2021			2020			2019		2018 (1)				2017
	(in thousands, except operating margin and per share data)
Operating revenues	$	2,043,544		$	1,695,390		$	1,557,796		$	1,433,984		$	1,274,172
Total operating expenses		970,819			810,626			802,095			747,086			694,402
Operating income		1,072,725			884,764			755,701			686,898			579,770
Other expense (income), net		214,589			198,539			152,383			57,002			112,871
Provision for income taxes		132,153			84,403			39,670			122,011			162,927
Net income	$	725,983		$	601,822		$	563,648		$	507,885		$	303,972
Operating margin		52.5	%		52.2	%		48.5	%		47.9	%		45.5	%
Earnings per basic common share	$	8.80		$	7.19		$	6.66		$	5.83		$	3.36
Earnings per diluted common share	$	8.70		$	7.12		$	6.59		$	5.66		$	3.31
Weighted average shares outstanding:
Basic		82,508			83,716			84,644			87,179			90,336
Diluted		83,479			84,517			85,536			89,701			91,914
Dividends declared per common share	$	3.64		$	2.92		$	2.52		$	1.92		$	1.32

	As of
	December 31,			December 31,			December 31,			December 31,			December 31,
	2021 (3)				2020		2019 (2)			2018 (1)				2017
	(in thousands)
Cash and cash equivalents	$	1,421,449		$	1,300,521		$	1,506,567		$	904,176		$	889,502
Accounts receivable, net of allowances	$	664,511		$	558,569		$	499,268		$	473,433		$	327,597
Goodwill and intangibles, net of accumulated amortization	$	2,829,727		$	1,800,770		$	1,824,355		$	1,826,564		$	1,882,457
Total assets	$	5,506,703		$	4,198,647		$	4,204,439		$	3,387,952		$	3,275,668
Deferred revenue	$	824,912		$	675,870		$	574,656		$	537,977		$	374,365
Long-term debt, net of current maturities	$	4,161,422		$	3,366,777		$	3,071,926		$	2,575,502		$	2,078,093
Total shareholders' equity (deficit)	$	(163,467	)	$	(443,234	)	$	(76,714	)	$	(166,494	)	$	401,012

(1)	Includes the impact of the Financial Engineering Associates, Inc. and Investor Force Holdings, Inc. divestitures.

(2)	Reflects the impact of the adoption on January 1, 2019 of Accounting Standards Update 2016-02, "Lease (Topic 842)," the impact of which was the inclusion of $166.4 million of right of use assets on the Company's Consolidated Statement of Financial Condition as of December 31, 2019.

(3)	Includes the impact from the acquisition of RCA commencing as of September 13, 2021 (the date we completed the acquisition).

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