Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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The carrying amounts of cash and cash equivalent items which are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against short-term borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. For a classified balance sheet represents the current portion only (the noncurrent portion has a separate concept); there is a separate and distinct element for unclassified presentations.

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Description of Business and Summary of Significant Accounting Policies (Cash And Cash Equivalents And Restricted Cash) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Cash and Cash Equivalents	$ 135,583	$ 119,923	$ 168,056	$ 204,240
Restricted Cash	44,370	42,594
Corporate [Member]
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Cash and Cash Equivalents	40,846	36,579
Joint Venture [Member]
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Cash and Cash Equivalents	$ 94,737	$ 83,344