Note 10 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

	Current		Deferred			Total
Year Ended December 31, 2019
U.S. Federal	$	1,249	$	43,270		$	44,519
State and local		3,678		7,036			10,714
Total	$	4,927	$	50,306		$	55,233
Year Ended December 31, 2018
U.S. Federal	$	10,214	$	32,176		$	42,390
State and local		2,284		2,550			4,834
Total	$	12,498	$	34,726		$	47,224
Year Ended December 31, 2017
U.S. Federal	$	38,033	$	(91,271	)	$	(53,238	)
State and local		4,164		4,046			8,210
Total	$	42,197	$	(87,225	)	$	(45,028	)

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

	Year Ended December 31,
	2019			2018			2017
U.S. Federal taxes at statutory rate	$	49,101		$	44,517		$	66,550
State and local taxes, net of U.S. Federal tax		8,464			3,816			5,487
Benefit from remeasurement of deferred taxes due to U.S. Federal tax reform legislation		-			-			(113,976	)
Equity-based compensation		(5,296	)		(3,690	)		(3,089	)
Section 162(m) limitation		656			113			-
Other items		2,308			2,468			-
Income tax provision (benefit)	$	55,233		$	47,224		$	(45,028	)

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

	As of December 31,
	2019		2018
Other benefit obligations	$	1,890	$	1,940
Equity-based compensation		4,563		4,080
Net operating losses		25,532		1,983
Accrued bonus		2,313		1,826
Reserves		1,134		365
Interest rate swap		22,101		-
Other items		2,104		1,204
Deferred tax assets		59,637		11,398
Property, plant and equipment		201,208		119,851
Goodwill and other intangible assets		159,074		131,765
Prepaid commissions		2,127		1,909
Other items		542		-
Deferred tax liabilities		362,951		253,525
Net deferred income tax liability	$	303,314	$	242,127