Operating Segments and Related Information Narrative Accounts Receivable (Details)	Jun. 30, 2013 customers	Dec. 31, 2012 customers
Accounts, Notes, Loans and Financing Receivable [Line Items]
The Number Of Customers That Account for 10% or Greater of the Company's Accounts Receivables	3	1
Customer A [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage Of Total Trade Receivables	12.00%
Customer C [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage Of Total Trade Receivables	22.00%	24.00%
Customer F [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage Of Total Trade Receivables	12.00%