Supplemental Cash Flow Information Significant Non-Cash Investing Activities(Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Other Significant Noncash Transactions [Line Items]
Accounts Receivable, Gross, Current	$ 329,208,000	$ 265,642,000
Purchases of property and equipment accrued in accounts payable	40,100,000	22,600,000	17,600,000
Accounts receivable - grants from outside parties [Member]
Other Significant Noncash Transactions [Line Items]
Accounts Receivable, Gross, Current	$ 33,003,000	$ 25,036,000	$ 20,800,000