Income Taxes (Tables)

12 Months Ended

Dec. 31, 2015

Income Tax Disclosure [Abstract]

Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]

Income before income taxes by geographic area was, for the years ended December 31:

(in thousands)	2015			2014		2013
Federal	$	45,456		$	57,950	$	54,872
Foreign		(1,157	)		—		—
	$	44,299		$	57,950	$	54,872

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

The income tax provision consisted of the following for the years ended December 31:

(in thousands)	2015			2014		2013
Current
Federal	$	12,433		$	14,720	$	16,812
State		3,006			3,031		2,920
		15,439			17,751		19,732
Deferred
Federal		1,553			3,154		218
Foreign		(272	)		—		—
State		277			501		163
		1,558			3,655		381
Income tax expense	$	16,997		$	21,406	$	20,113

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

The differences between the U.S. federal statutory tax rate and the Company’s effective tax rate for continuing operations were as follows for the years ended December 31:

	2015			2014			2013
U.S federal statutory rate		35.0	%		35.0	%		35.0	%
State income taxes, net of U.S. federal income tax expense		4.6			3.6			3.5
Provision to return adjustments, net		0.5			0.2			(0.3	)
Tax differential on foreign earnings		0.3			—			—
Domestic production/manufacturing deduction		(2.4	)		(2.3	)		(2.0	)
Non-deductible meals and entertainment		0.6			0.4			0.4
Expiration of uncertain tax positions		(0.4	)		—			—
Other, net		0.2			—			0.1
Effective rate		38.4	%		36.9	%		36.7	%

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

The net deferred tax assets and (liabilities) arising from temporary differences was as follows at December 31:

(in thousands)	2015			2014
Deferred income tax assets:
Self insurance reserves	$	7,464		$	8,369
Contract loss reserves		240			72
Stock-based awards		3,986			4,420
Bonus		2,497			2,578
Other		960			886
Total deferred income tax assets		15,147			16,325
Deferred income tax liabilities:
Property and equipment – tax over book depreciation		(25,859	)		(25,350	)
Intangible assets – tax over book amortization		(3,670	)		(3,799	)
Total deferred income tax liabilities		(29,529	)		(29,149	)
Net deferred income taxes	$	(14,382	)	$	(12,824	)

Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]

The following is a reconciliation of the beginning and ending liability for unrecognized tax benefits at December 31:

(in thousands)	2015			2014
Balance at beginning of period	$	507		$	657
Gross increases in current period tax positions		62			93
Gross increases in prior period tax positions		19			—
Gross decreases in prior period tax positions		(163	)		(243	)
Balance at end of period		425			507
Accrued interest and penalties at end of period		139			223
Total liability for unrecognized tax benefits	$	564		$	730