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Prepaid Expenses and Other Current Assets (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Line Items]
Survey incentives and prepaid postage	$ 2,053	$ 1,770
Prepaid income taxes	1,308	1,984
Stock option proceeds receivable	757	4
Insurance recovery receivables	329	993
Other	2,069	2,390
Prepaid expenses and other current assets	$ 6,516	$ 7,141

The total of the amounts paid in advance for capitalized costs that will be expensed with the passage of time or the occurrence of a triggering event, and will be charged against earnings within one year or the normal operating cycle, if longer, and the aggregate carrying amount of current assets, as of the balance sheet date, not separately presented elsewhere in the balance sheet. Current assets are expected to be realized or consumed within one year (or the normal operating cycle, if longer).

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- Definition

Carrying amount as of the balance sheet date of payments made in advance for income and other taxes, which will be charged against earnings within one year or the normal operating cycle, if longer.

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