Income Taxes (Tables)

12 Months Ended

Dec. 31, 2013

Income Tax Disclosure [Abstract]

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

Income before income taxes was attributable to the following sources:

	Year Ended December 31,
	2013		2012		2011
United States	$	29,203	$	35,414	$	18,261
Canada	6,362		5,244		5,039
Total	$	35,565	$	40,658	$	23,300

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

The provision for income taxes follows:

	Year Ended December 31,
	2013		2012			2011
Currently payable:
Federal	$	7,089	$	15,853		$	3,065
State	2,183		2,239			2,277
Canadian	1,724		1,578			1,565
Total current	10,996		19,670			6,907
Deferred taxes	1,716		(3,607		)	2,328
Total taxes on income	$	12,712	$	16,063		$	9,235

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

A reconciliation of the expected statutory U.S. federal rate to our actual effective income tax rate follows:

	Year Ended December 31,
	2013		2012		2011
Statutory U.S. federal tax rate	35.0	%	35.0	%	35.0	%
State income taxes, net of federal benefit	3.6		3.9		5.1
Effect of Canadian income taxes	(1.6	)	(1.0	)	(1.2	)
Nondeductible expenses	1.9		1.4		2.5
ESOP dividend deduction	(.8	)	(.7	)	(1.2	)
Audit settlements and uncertain tax adjustments	(2.2	)	1.8		1.8
Valuation allowance on foreign tax credits	—		—		(1.1	)
All other, net	(.2	)	(.9	)	(1.3	)
Effective income tax rate	35.7	%	39.5	%	39.6	%

Schedule of Deferred Tax Assets and LIabilities, Current [Table Text Block]

Significant components of our current net deferred tax assets and liabilities at December 31, were as follows:

	December 31,
	2013			2012
Deferred tax assets:
Accrued compensation obligations	$	1,883		$	2,424
Self-insurance accruals	7,693			7,083
Prepaid expenses	(2,565		)	(1,903		)
Other, net	908			1,405
	7,919			9,009
Less deferred tax asset valuation allowance	204			194
Net deferred income tax assets--current	$	7,715		$	8,815

Deferred Tax Assets and Liabilities, Noncurrent [Table Text Block]

Significant components of our noncurrent net deferred tax assets and liabilities at December 31, were as follows:

	December 31,
	2013			2012
Deferred tax assets:
Self-insurance accruals	$	12,129		$	14,497
Intangibles	(234		)	(341		)
Accrued expenses and other liabilities	895			895
Accrued stock compensation	1,550			1,476
Defined benefit pension plans	1,873			4,698
Foreign tax credit carryforward	768			768
Other future deductible amounts, net	1,737			1,470
	18,718			23,463
Less deferred tax asset valuation allowance	564			574
	18,154			22,889
Deferred tax liabilities:
Property and equipment	20,718			21,830
	20,718			21,830
Net deferred tax assets--noncurrent				$	1,059
Net deferred tax liabilities--noncurrent	$	2,564

Summary of Income Tax Contingencies [Table Text Block]

The balance of unrecognized benefits and the amount of related interest and penalties at December 31, were as follows:

	December 31,
	2013		2012
Unrecognized tax benefits	$	1,221	$	2,638
Portion, if recognized, would reduce tax expense and effective tax rate	942		1,933
Accrued interest on unrecognized tax benefits	41		142
Accrued penalties on unrecognized benefits	—		—

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

The changes in our unrecognized tax benefits are summarized in the table below:

	Year Ended December 31,
	2013			2012			2011
Balance, beginning of year	$	2,638		$	1,825		$	1,524
Additions based on tax positions related to the current year	370			667			279
Additions for tax positions of prior years	133			149			101
Reductions for tax positions of prior years	(1,155		)	(3		)	(61		)
Reductions related to settlements with taxing authorities	(460		)	—			—
Lapses in statutes of limitations	(305		)	—			(18		)
Balance, end of year	$	1,221		$	2,638		$	1,825