Income Taxes (Tables)

12 Months Ended

Dec. 31, 2017

Income Tax Disclosure [Abstract]

Summary of Provision for Income Taxes

The following table summarizes the provision for income taxes:

	Year Ended December 31,
	2017			2016		2015
	(in thousands)
Current:
Federal	$	35,673		$	33,032	$	11,917
State	7,179			6,958		2,173
	42,852			39,990		14,090
Deferred:
Federal	2,924			2,163		13,646
State	(1,037		)	838		4,004
	1,887			3,001		17,650
Tax provision	$	44,739		$	42,991	$	31,740

Significant Components of Federal and State Deferred Tax Assets and Liabilities

Significant components of the Company’s federal and state deferred tax asset and liability balances are as follows:

	Year Ended December 31,
	2017			2016
	(in thousands)
Deferred tax assets:
Allowance for doubtful accounts	$	3,109		$	2,672
Deferred compensation	6,601			8,532
Accrued insurance claims	3,665			5,862
Non-deductible reserves	567			1,257
Amortization of intangibles	162			624
Other	662			858
	14,766			19,805
Deferred tax liabilities:
Expensing of housekeeping supplies	(4,678		)	(6,752		)
Depreciation of property and equipment	(1,745		)	(2,568		)
Other	(845		)	(663		)
	(7,268		)	(9,983		)
Net deferred tax assets	$	7,498		$	9,822

Reconciliation of The Provision for Income Taxes

The table below provides a reconciliation between the tax expense computed by applying the statutory federal income tax rate to income before income taxes and the provision for income taxes:

	Year Ended December 31,
	2017			2016			2015
	(in thousands)
Income tax expense computed at statutory rate	$	46,538		$	42,136		$	31,418
Increases (decreases) resulting from:
State income taxes, net of federal tax benefit	3,661			5,064			4,015
Federal jobs credits	(4,193		)	(4,550		)	(3,900		)
Tax exempt interest	(568		)	(457		)	(132		)
Other, net	(699		)	798			339
Income tax expense	$	44,739		$	42,991		$	31,740