Accounts Receivable and Other Receivables (Tables)

3 Months Ended

Mar. 31, 2013

Receivables [Abstract]

Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]

Accounts receivable balances consisted of the following (in thousands):

	March 31, 2013			December 31, 2012
Accounts receivable, gross	$	50,936		$	52,068
Less: allowance for doubtful accounts	(469		)	(779		)
Accounts receivable, net	$	50,467		$	51,289