Income Taxes (Tables)

12 Months Ended

Dec. 31, 2012

Income Taxes [Abstract]

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

		Years Ended December 31,
		2012	2011	2010
Deferred tax expense:
Federal taxes	$	10,318	6,264	7,846
State taxes		1,770	1,141	1,402
	$	12,088	7,405	9,248

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

		Years Ended December 31,
		2012	2011	2010
“Expected” statutory tax expense	$	7,437	4,500	6,215
State income taxes, net of federal expense		1,770	1,141	1,129
Income tax effect of nondeductible entertainment expenses		777	737	775
Income tax effect of nondeductible lobbying expenses		298	327	405
Income tax effect of nondeductible officer compensation		1,718	758	722
Other, net		88	(58)	2
	$	12,088	7,405	9,248

ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock

			2012	2011
Current deferred tax assets, net of current deferred tax liability:
	Net operating loss carryforwards	$	3,952	7,796
	Compensated absences, accrued for financial reporting purposes		2,605	2,664
	Workers compensation and self-insurance health reserves, principally due to accrual for financial reporting purposes		1,357	1,068
	Accounts receivable, principally due to allowance for doubtful receivables		1,319	2,379
	Deferred compensation expense for tax purposes in excess of amounts recognized for financial reporting purposes		32	131
	Deferred revenue for financial reporting purposes		2,734	1,362
	Other		898	155
	Total current deferred tax assets	$	12,897	15,555
Long-term deferred tax assets:
	Net operating loss carryforwards	$	116,034	119,762
	Deferred revenue for financial reporting purposes		36,316	18,097
	Alternative minimum tax credits		1,895	1,895
	Deferred compensation expense for tax purposes in excess of amounts recognized for financial reporting purposes		2,543	2,581
	Asset retirement obligations in excess of amounts recognized for tax purposes		6,680	6,248
	Share-based compensation expense for financial reporting purposes in excess of amounts recognized for tax purposes		1,675	4,394
	Other		3,353	469
	Total long-term deferred tax assets		168,496	153,446
Long-term deferred tax liabilities:
	Plant and equipment, principally due to differences in depreciation		233,530	211,172
	Intangible assets		58,627	56,508
	Total long-term deferred tax liabilities		292,157	267,680
	Net long-term deferred tax liabilities	$	123,661	114,234

Summary of Operating Loss Carryforwards [Table Text Block]

Years ending December 31,		Federal	State
2020	$	43,863	42,768
2021		29,614	28,987
2022		14,081	13,788
2023		3,968	3,903
2024		722	-
2025		737	-
2026		150	-
2027		1,010	-
2028		39,879	39,715
2029		48,370	47,558
2031		110,933	109,376
Total tax net operating loss carryforwards	$	293,327	286,095