Allowance For Doubtful Accounts (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of year	$ 2,168	$ 2,407	$ 3,090
Provision	53	1,014	23
Write-offs, net of recoveries	(199)	(1,253)	(706)
Balance, end of year	$ 2,022	$ 2,168	$ 2,407