Assets Held-for-Sale and Discontinued Operations (Details 2) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Discontinued operations
Undiscounted contractual commitments	$ 139,200,000		$ 139,200,000
Liability related to discontinue operation	63,100,000		63,100,000		113,600,000
Current liability to discontinued operations	28,824,000		28,824,000		64,404,000
Income (loss) from discontinued operations
Income (loss) from discontinued operations, net of tax	(1,032,000)	(26,873,000)	483,000	(19,862,000)
Oil and gas
Operating revenues
Operating revenues	3,471,000	12,050,000	8,528,000	22,039,000
Income (loss) from discontinued operations
Income (loss) from discontinued operations	(1,082,000)	(10,272,000)	1,536,000	(8,202,000)
Less: Impairment charges or other (gains) and losses on sale of wholly owned assets	409,000	34,663,000	1,411,000	36,663,000
Less: Income tax expense (benefit)	(459,000)	(10,882,000)	(358,000)	(11,165,000)
Income (loss) from discontinued operations, net of tax	(1,032,000)	(34,053,000)	483,000	(33,700,000)
Rig Services
Operating revenues
Operating revenues		34,600,000		81,800,000
Income (loss) from discontinued operations
Income (loss) from discontinued operations, net of tax		$ 7,200,000		$ 13,800,000