Accounts Receivable (Tables)

12 Months Ended

Dec. 31, 2012

Accounts Receivable [Abstract]

Changes in allowance for doubtful accounts

	Year Ended December 31,
	2012			2011			2010
	(In Thousands)
Balance at beginning of year	$	300		$	595		$	490
Provisions for doubtful accounts		21			-			113
Charge-offs, net of recoveries		(71	)		(295	)		(8	)
Balance at end of year	$	250		$	300		$	595