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RESTRICTED INVESTMENTS AND BOND COLLATERAL - Carrying Value and Estimated Fair Value of Restricted Investments and Bond Collateral (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Investment [Line Items]
Restricted investments and bond collateral	$ 104,511	$ 69,235
Carrying Value
Investment [Line Items]
Cash and cash equivalents	67,340
Time deposits	2,451
Held-to-maturity securities	34,720
Restricted investments and bond collateral	104,511
Fair Value
Investment [Line Items]
Cash and cash equivalents	67,340
Time deposits	2,451
Held-to-maturity securities	35,259
Restricted investments and bond collateral	$ 105,050

This item represents investments in debt securities which are categorized as held-to-maturity and that have scheduled maturities more than one year from the balance sheet date or operating cycle, if longer, and that are pledged to one or more secured parties who have the right to buy, sell, or re-pledge the collateral.

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