Oil and Gas Properties and Equipment (Tables)

6 Months Ended

Jun. 30, 2013

Oil And Gas Properties And Equipment Tables [Abstract]

Capitalized Costs Relating to Oil and Gas Producing Activities Disclosure [Text Block]

2. OIL AND GAS PROPERTIES AND EQUIPMENT:
		June 30,		December 31,
		2013		2012
Proven Properties:
Acquisition, equipment, exploration, drilling and environmental costs	$	7,413,154	$	7,235,765
Less: Accumulated depletion, depreciation and amortization(1)(2)		(5,693,732)		(5,578,265)
Net capitalized costs - oil and gas properties		1,719,422		1,657,500
Property, Plant and Equipment:
Gathering Systems(1)	$	286,153	$	282,879
Less: Accumulated depreciation(3)		(102,223)		(99,312)
		183,930		183,567
Other Property and Equipment		14,855		14,772
Less: Accumulated depreciation		(9,056)		(8,326)
		5,799		6,446
Land		22,360		22,359
Net capitalized costs - property, plant and equipment	$	212,089	$	212,372

(1)For the six months ended June 30, 2013 and 2012,total interest on outstanding debt was $51.4 million and $51.1 million, respectively, of which, $0.4 million and $14.0 million, respectively, was capitalized on the cost of unevaluated oil and natural gas properties and on work in process relating to gathering systems.

(2)The Company recorded a $2.9billion non-cash write-down of the carrying value of its proved oil and natural gas properties for the year ended December 31,2012 as a result of ceiling test limitations.

(3)The Company recognized impairments of $92.5 million during the year ended December 31, 2012related to the decline in fair value as defined in FASB ASC 820 as a result of a decrease in forecast throughput volumes on its gathering facilities in Pennsylvania dueto the decline in commodity prices. These assets are included in Property, Plant and Equipment in the Consolidated Balance Sheets. (See Note 7 for additional information on fair value).