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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	Sep. 30, 2014	Dec. 31, 2013
Investment [Line Items]
Restricted investments and bond collateral	$ 108,734	$ 69,235
Carrying Value
Investment [Line Items]
Cash and cash equivalents	71,164
Time deposits	2,451
Available-for-sale	35,119
Restricted investments and bond collateral	108,734
Fair Value
Investment [Line Items]
Restricted investments and bond collateral	108,734
Level 1 \| Fair Value
Investment [Line Items]
Cash and cash equivalents	71,164
Time deposits	2,451
Available-for-sale	$ 35,119

Investments in debt and equity securities which are categorized neither as trading securities nor held-to-maturity securities, which are intended be sold or mature greater than one year from the balance sheet date or the normal operating cycle, whichever is 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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