INVESTMENTS (Details 2) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Amortized cost of available-for-sale debt securities by contractual maturity
Due in one year or less	$ 7,482
Due after one year through five years	149,229
Due after five years through 10 years	639,502
Due after 10 years	232,515
Total amortized cost	1,380,774
Fair value of available-for-sale debt securities by contractual maturity
Due in one year or less	7,598
Due after one year through five years	157,574
Due after five years through 10 years	649,586
Due after 10 years	227,876
Total fair value	1,399,510	1,378,582
Amortized cost of debt securities held-to-maturity by contractual maturity
Due after one year through five years	651
Total amortized cost	651
Fair value of debt securities held-to-maturity by contractual maturity
Due after one year through five years	701
Total fair value	701
Mtge/ABS/CMBS
Amortized cost of available-for-sale debt securities by contractual maturity
Total amortized cost	352,046
Fair value of available-for-sale debt securities by contractual maturity
Total fair value	$ 356,876

Amount of available-for-sale debt securities at cost, net of adjustments, maturing in the sixth fiscal year through the tenth fiscal year following the latest fiscal year. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings (less any cumulative-effect adjustments, as defined) and fair value hedge accounting adjustments.

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