Income Taxes (Tables)

12 Months Ended

Dec. 31, 2016

Income Tax Disclosure [Abstract]

Reconciliation of Effective Tax Rate to Federal Statutory Tax Rate

The following is a reconciliation of our effective tax rate to the federal statutory tax rate:

	Years Ended December 31,
	2016				2015			2014
U.S. federal statutory rate		35.0		%		35.0	%		35.0		%
State taxes, net of federal benefit		2.6			2.4			2.9
State incentives		(0.2	)		(0.5)				(0.8	)
State law changes		0.3			(0.9)				(0.9	)
Nondeductible expenses		0.7			0.4				0.9
Other		-			-				(0.1	)
Net effective rate		38.4		%		36.4	%		37.0		%

Summary of Provision for Income Taxes

The following is a summary of our provision for income taxes (in thousands):

	Years Ended December 31,
	2016			2015			2014
Current
Federal	$	30,324		$	21,363		$	5,939
State and local		3,296			2,900			445
Foreign		108			284			249
		33,728			24,547			6,633
Deferred
Federal		11,981			16,538			23,600
State and local		971			(346	)		191
Foreign		(64	)		(106	)		(115	)
		12,888			16,086			23,676
Total provision	$	46,616		$	40,633		$	30,309

Summary of Deferred Tax Assets and Liabilities Presented as Noncurrent

In the following summary of our deferred tax assets and liabilities (in thousands), however, we are presenting all the deferred tax asset and liability balances as of both December 31, 2016 and December 31, 2015 as noncurrent for better year over year comparability:

	December 31,
	2016			2015
Accrued compensation		20,651			18,448
Other reserves		8,580			4,319
Tax credit carryforwards		1,694			1,257
Operating loss carryforwards		1,399			1,914
Total gross deferred income taxes		32,324			25,938
Valuation allowances		(456	)		(108	)
Total deferred tax assets		31,868			25,830
Prepaids		(3,401	)		(3,448	)
Other receivables		(3,051	)		(4,493	)
Property and equipment		(105,905	)		(87,148	)
Goodwill		(84,170	)		(82,511	)
Total deferred tax liabilities		(196,527	)		(177,600	)
Total deferred taxes	$	(164,659	)	$	(151,770	)

Unrecognized Tax Benefits

A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows (in thousands):

	2016			2015
Gross unrecognized tax benefits - beginning of the year	$	1,139		$	1,065
Gross increases related to prior year tax positions		394			166
Gross increases related to current year tax positions		488			153
Lapse of applicable statute of limitations		(189	)		(245	)
Gross unrecognized tax benefits - end of year	$	1,832		$	1,139