Summary Of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2012

Summary Of Significant Accounting Policies [Abstract]

Summary Of Adjustments In Allowances For Doubtful Accounts And Sales Adjustments

		Years  ended December 31,
	2012		2011		2010
Balance at beginning of year	$	990	$	1,603	$	2,389
Provisions for losses – accounts receivable		961		805		1,161
Collection of accounts previously reserved		-		(142)		4
Deductions for accounts charged off or credits issued		(330)		(1,276)		(1,951)
Balance at end of year	$	1,621	$	990	$	1,603