Annual report pursuant to Section 13 and 15(d)

Accounts Receivable (Details)

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Accounts Receivable (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Summary of Accounts Receivables    
Trade Accounts Receivable $ 44,196 $ 33,178
Long-term contract receivables:    
Amounts Billed 907 1,068
Unbilled Recoverable Costs and Accrued Profits 1,020 2,068
Total Long-term Contract Receivables 1,927 3,136
Total Receivables 46,123 36,314
Less Allowance for Doubtful Accounts (650) (645)
Accounts Receivable $ 45,473 $ 35,669