Income Taxes (Tables)

12 Months Ended

Dec. 31, 2016

Income Tax Disclosure [Abstract]

Schedule of Components of Income Tax Expense (Benefit)

The amounts provided for income taxes are as follows:

	Year Ended December 31,
	2016		2015			2014
Current:
U.S. Federal	$	29,185	$	40,542		$	8,809
State	7,407		13,886			2,416
	$	36,592	$	54,428		$	11,225
Deferred:
U.S. Federal	$	10,076	$	(9,943	)	$	16,484
State	2,495		(3,252		)	5,456
	12,571		(13,195		)	21,940
Total	$	49,163	$	41,233		$	33,165

Schedule of Deferred Tax Assets and Liabilities

The tax effect of temporary differences which give rise to a significant portion of deferred tax assets and liabilities are as follows:

	December 31, 2016			December 31, 2015
Deferred tax assets:
Employee benefit accruals	$	17,335		$	16,201
Impairment of investments	1,534			4,332
Impact of timing of settlement payments	28,266			39,840
Various U.S. state tax loss carryforwards	6,551			6,713
Other	2,803			—
	56,489			67,086
Less: Valuation allowance	(4,439		)	(3,900		)
Net deferred tax assets	$	52,050		$	63,186
Deferred tax liabilities:
Excess of tax basis over book-basis non-consolidated entities	$	(7,494	)	$	(7,292	)
Book/tax differences on fixed and Intangible assets	(54,776		)	(52,598		)
Capitalized interest expense	(8,673		)	(4,080		)
Book/tax differences on inventory	(16,143		)	(16,891		)
Book/tax differences on long-term investments	(23,937		)	(29,701		)
Impact of accounting for convertible debt	(27,362		)	(30,494		)
Book/tax differences on available for sale securities	(6,750		)	—
Other	—			(1,559		)
	$	(145,135	)	$	(142,615	)
Net deferred tax liabilities	$	(93,085	)	$	(79,429	)

Schedule of Effective Income Tax Rate Reconciliation

Differences between the amounts provided for income taxes and amounts computed at the federal statutory tax rate are summarized as follows:

	Year Ended December 31,
	2016			2015			2014
Income before income taxes	$	126,429		$	107,705		$	82,279
Federal income tax expense at statutory rate	44,250			37,697			28,798
Increases (decreases) resulting from:
State income taxes, net of federal income tax benefits	6,991			6,862			4,804
Impact of non-controlling interest	(2,148		)	(2,516		)	(4,290		)
Non-deductible expenses	2,569			2,941			2,581
Impact of domestic production deduction	(2,603		)	(3,436		)	(248		)
Tax credits	(359		)	(265		)	(275		)
Other	(1,202		)	152			—
Inclusion of tax liabilities from unincorporated entities	1,126			831			1,374
Changes in valuation allowance, net of equity and tax audit adjustments	539			(1,033		)	421
Income tax expense	$	49,163		$	41,233		$	33,165

Schedule of Unrecognized Tax Benefits

The following table summarizes the activity related to the unrecognized tax benefits:

Balance at January 1, 2014	$	3,122
Additions based on tax positions related to prior years	318
Settlements	(442		)
Expirations of the statute of limitations	(1,254		)
Balance at December 31, 2014	1,744
Additions based on tax positions related to prior years	265
Settlements	(132		)
Expirations of the statute of limitations	(354		)
Balance at December 31, 2015	1,523
Additions based on tax positions related to prior years	72
Settlements	(119		)
Expirations of the statute of limitations	(961		)
Balance at December 31, 2016	$	515