Assets Held-for-Sale and Discontinued Operations (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Assets held-for-sale
Assets held for sale	$ 78,400	$ 146,467
Assets Held-for-sale
Assets held-for-sale
Assets held for sale	78,400	146,467
Fair value adjustment	(51,000)
Oil and Gas | Assets Held-for-sale
Assets held-for-sale
Assets held for sale	76,300	$ 146,467
Other | Assets Held-for-sale
Assets held-for-sale
Assets held for sale	$ 2,100