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Cash and Cash Equivalent Balances (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents in domestic accounts	$ 225,396	$ 191,460
Cash and cash equivalents in foreign accounts	63,787	56,240
Cash and cash equivalents of continued operations at end of period	$ 289,183	$ 247,700	$ 224,259

Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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