Restatement of Consolidated Financial Statements (Tables)

12 Months Ended

Dec. 31, 2012

Accounting Changes and Error Corrections [Abstract]

Schedule of Quantifying Prior Year Misstatements Corrected in Financial Statements [Table Text Block]

Balance Sheets
(In thousands)	12/31/2012			12/31/2011
Accumulated depreciation
As originally filed	$	(1,154,456	)	$	(1,044,589	)
Immaterial correction	—			(18,599		)
As restated with immaterial correction	(1,154,456		)	(1,063,188		)
Restatement	(7,757		)	(8,790		)
As restated	$	(1,162,213	)	$	(1,071,978	)
Total assets
As originally filed	$	2,027,622		$	2,074,557
Immaterial correction	—			(18,599		)
As restated with immaterial correction	2,027,622			2,055,958
Restatement	(7,757		)	(8,790		)
As restated	$	2,019,865		$	2,047,168
Deferred Tax Liability
As originally filed	$	156,740		$	135,446
Immaterial correction	—			(1,679		)
As restated with immaterial correction	156,740			133,767
Restatement	(2,948		)	(3,340		)
As restated	$	153,792		$	130,427
Limited Partners' Equity
As originally filed	$	182,469		$	182,438
Immaterial correction	—			(16,920		)
As restated with immaterial correction	182,469			165,518
Restatement	(4,809		)	(5,450		)
As restated	$	177,660		$	160,068

Statements of Operations and Comprehensive Income
For the years ended December 31,	2012			2011			2010
(In thousands, except per unit amounts)
Depreciation and amortization
As originally filed	$	127,339		$	123,805		$	126,796
Immaterial correction	—			2,032			2,060
As restated with immaterial correction	127,339			125,837			128,856
Restatement	(1,033		)	—			—
As restated	$	126,306		$	125,837		$	128,856
Loss on impairment / retirement of fixed assets, net
As originally filed	$	30,336		$	2,565		$	62,752
Immaterial correction	—			—			—
As restated with immaterial correction	30,336			2,565			62,752
Restatement	—			8,790			—
As restated	$	30,336		$	11,355		$	62,752
Income (loss) before tax
As originally filed	$	132,581		$	83,995		$	(28,322	)
Immaterial correction	—			(2,032		)	(2,060		)
As restated with immaterial correction	132,581			81,963			(30,382		)
Restatement	1,033			(8,790		)	—
As restated	$	133,614		$	73,173		$	(30,382	)
Provision (benefit) for taxes
As originally filed	$	31,365		$	11,837		$	3,245
Immaterial correction	—			(620		)	(575		)
As restated with immaterial correction	31,365			11,217			2,670
Restatement	392			(3,340		)	—
As restated	$	31,757		$	7,877		$	2,670
Net income (loss)
As originally filed	$	101,216		$	72,158		$	(31,567	)
Immaterial correction	—			(1,412		)	(1,485		)
As restated with immaterial correction	101,216			70,746			(33,052		)
Restatement	641			(5,450		)	—
As restated	$	101,857		$	65,296		$	(33,052	)
Basic earnings per limited partner unit:
As originally filed	$	1.82		$	1.30		$	(0.57	)
Immaterial correction	—			(0.02		)	(0.03		)
As restated with immaterial correction	1.82			1.28			(0.60		)
Restatement	0.01			(0.10		)	—
As restated	$	1.83		$	1.18		$	(0.60	)
Diluted earnings per limited partner unit:
As originally filed	$	1.81		$	1.29		$	(0.57	)
Immaterial correction	—			(0.02		)	(0.03		)
As restated with immaterial correction	1.81			1.27			(0.60		)
Restatement	0.01			(0.10		)	—
As restated	$	1.82		$	1.17		$	(0.60	)