RESTRICTED INVESTMENTS AND BOND COLLATERAL - Maturities of Held-to-Maturity Securities (Detail) (Held-to-maturity securities, USD $) In Thousands, unless otherwise specified	Mar. 31, 2014
Held-to-maturity securities
Schedule of Held-to-maturity Securities [Line Items]
Within one year, Amortized cost	$ 1,193
Due in five years or less, Amortized cost	19,539
Due after five years to ten years, Amortized cost	6,718
Due in more than ten years, Amortized cost	7,098
Maturities of held-to-maturity securities, Amortized cost	34,548
Within one year, Fair Value	1,217
Due in five years or less, Fair Value	19,752
Due after five years to ten years, Fair Value	6,717
Due in more than ten years, Fair Value	7,021
Fair value	$ 34,707