Long-Term Debt Assets Pledged as Collateral (Details) $ in Thousands	Dec. 31, 2017 USD ($)
Assets Pledged as Collateral
Assets pledged as collateral	$ 1,491,258
Cash and cash equivalents
Assets Pledged as Collateral
Assets pledged as collateral	34,704
Restricted Cash and other assets (including long-term)
Assets Pledged as Collateral
Assets pledged as collateral	29,047
Accounts and notes receivable, net
Assets Pledged as Collateral
Assets pledged as collateral	50,073
Inventories
Assets Pledged as Collateral
Assets pledged as collateral	2,979
Properties
Assets Pledged as Collateral
Assets pledged as collateral	277,389
Other intangible assets
Assets Pledged as Collateral
Assets pledged as collateral	$ 1,097,066

The carrying amount, as of the date of the latest financial statement presented, of all assets that are pledged as collateral for the payment of the related debt obligation primarily arising from secured borrowings, repurchase agreements or other current or potential obligations, where the secured party does not have the right by contract or custom to sell or re-pledge the collateral and therefore are not reclassified and separately reported in the statement of financial position.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 30
-Section 50
-Paragraph 1A
-Subparagraph (b)(1)(i)
-URI http://asc.fasb.org/extlink&oid=64858031&loc=SL6224234-111729

Name:	us-gaap_PledgedAssetsNotSeparatelyReportedOnStatementOfFinancialPosition
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant