CONTINGENCIES - Condensed Income Statement (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Condensed Financial Statements, Captions [Line Items]
NET REVENUES	$ 102,092	$ 102,295	$ 104,571	$ 79,966	$ 95,134	$ 100,429	$ 104,650	$ 82,514	$ 388,924	$ 382,727	$ 391,447
Operating Expenses Abstract
Depreciation Depletion And Amortization									10,839	11,276	12,660
General and Administrative Expense									25,874	26,609	21,954
Acquisition Costs									0	1,542	0
Net (gain) loss on sale or disposal of assets									138	163	228
Operating Expenses									312,330	303,254	293,738
Operating Income Loss	30,951	29,385	5,368	10,890	25,920	22,263	24,015	7,275	76,594	79,473	97,709
Other income									(118)	(32)	(49)
TOTAL OTHER (INCOME) EXPENSE									52,852	27,407	30,678
INCOME (LOSS) BEFORE INCOME TAXES (BENEFIT)									23,742	52,066	67,031
Income Tax Expense (Benefit)									12,474	(14,211)	20,595
Net Income (Loss) Attributable to Parent	7,347	8,177	(3,207)	(1,049)	10,524	8,231	46,501	1,021	11,268	66,277	46,436
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
NET REVENUES									659	652	626
Operating Expenses Abstract
Depreciation Depletion And Amortization									920	852	1,287
General and Administrative Expense									25,717	26,464	21,811
Acquisition Costs									0	1,542	0
Net (gain) loss on sale or disposal of assets									0	(28)	(63)
Operating Expenses									26,637	28,830	23,035
Operating Income Loss									(25,978)	(28,178)	(22,409)
Net interest expense, including amortization of deferred financing expense									(46)	58	1
Other income									(118)	(32)	(49)
Income from equity investment in subsidiaries									(49,556)	(80,270)	(89,392)
TOTAL OTHER (INCOME) EXPENSE									(49,720)	(80,244)	(89,440)
INCOME (LOSS) BEFORE INCOME TAXES (BENEFIT)									23,742	52,066	67,031
Income Tax Expense (Benefit)									12,474	(14,211)	20,595
Net Income (Loss) Attributable to Parent									$ 11,268	$ 66,277	$ 46,436