Accounts Receivable Accounts Receivable (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Receivables [Abstract]
Allowance for Loan and Lease Loss, Recovery of Bad Debts	$ 1,785	$ 3,402	$ 9,084

Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts.

No definition available.

Name:	us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration