Income Taxes (Tables)

12 Months Ended

Dec. 31, 2021

Income Tax Disclosure [Abstract]

Schedule of Components of Provision For Income Taxes

The components of the provision for income taxes are as follows:

	2021		2020		2019
Currently payable:
Federal	$	89,507,896	$	67,606,617	$	73,563,685
State	5,642,926		10,180,218		3,765,929
Foreign	2,098,433		1,882,195		1,468,018
Total	97,249,255		79,669,030		78,797,632
Deferred income tax benefit:
Primarily federal	(41,694,751)		(15,419,722)		(3,066,237)
Provision for income taxes	$	55,554,504	$	64,249,308	$	75,731,395

Schedule of Effective Income Tax Rates Different from Statutory Federal Income Tax Rates

The effective income tax rates are different from the statutory federal income tax rates for the following reasons:

	2021		2020		2019
Statutory federal income tax rate	21.0	%	21.0	%	21.0	%
State income taxes, net of federal income tax benefit	0.7		2.1		0.6
Research tax credit	(1.0)		(1.4)		(1.1)
Increase (Decrease) in reserve for uncertain tax provisions	0.1		(0.1)		0.3
Foreign tax credit	(0.2)		(0.1)		(0.1)
Foreign derived intangible income deduction	(6.3)		(5.2)		(4.8)
Stock compensation	(1.3)		(1.0)		(1.1)
Other	0.3		0.3		0.3
Effective income tax rate	13.3	%	15.6	%	15.1	%

Schedule of Deferred Income Tax Assets And Liabilities

The tax effect of temporary differences which give rise to deferred income tax assets and liabilities at    December 31, 2021 and 2020, are as follows: 

	December 31,
	2021		2020
Assets:
Accruals not currently deductible	$	12,823,493	$	13,135,048
Research and development costs	49,099,538		13,371,625
Stock based compensation	13,707,737		11,983,900
Other	2,118,484		1,163,204
Total deferred income tax assets	$	77,749,252	$	39,653,777
Liabilities:
Excess tax over book depreciation	$	(20,728,577)	$	(29,977,693)
Goodwill	(37,999,022)		(33,427,901)
Intangible assets	(11,718,904)		(11,237,588)
Other	(2,507,071)		(3,971,338)
Total deferred income tax liabilities	$	(72,953,574)	$	(78,614,520)
Net deferred income taxes	$	4,795,678	$	(38,960,743)

Schedule of Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits

A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:

	2021		2020		2019
Beginning of year	$	4,864,000	$	6,392,000	$	4,678,000
Additions based on tax positions related to the current year	1,023,000		918,000		1,695,000
Additions for tax positions in prior years	364,000		770,000		657,000
Reductions for tax positions in prior years	(51,000)		(2,907,000)		(38,000)
Reductions as a result of a lapse of the applicable statute of limitations	(925,000)		(309,000)		(600,000)
End of year	$	5,275,000	$	4,864,000	$	6,392,000