AVAILABLE-FOR-SALE SECURITIES (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
AVAILABLE-FOR-SALE SECURITIES
Proceeds from sale of available-for-sale securities		$ 30,732		$ 30,732
Loss on sale of available-for-sale securities		(6,731)		(6,731)
Schedule of Available-for-sale Securities
Estimated fair value	68,805		68,805		44,719
Other than temporary impairment loss on available-for-sale securities	17,313	11,581	28,308	11,581
Available-for-sale securities in an unrealized gain position
Schedule of Available-for-sale Securities
Cost (net of impairments)	35,745		35,745		4,352
Unrealized gains (losses) in accumulated other comprehensive loss	4,327		4,327		1,902
Estimated fair value	40,072		40,072		6,254
Available-for-sale securities in an unrealized loss position
Schedule of Available-for-sale Securities
Cost (net of impairments)	33,287		33,287		48,047
Unrealized gains (losses) in accumulated other comprehensive loss	(4,554)		(4,554)		(9,582)
Estimated fair value	28,733		28,733		38,465
Other than temporary impairment loss on available-for-sale securities	$ 17,300	$ 11,600	$ 28,300	$ 11,600
Maximum duration of impairment for investments in available-for-sale securities			3 months

This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

+ References+ Details

Equity securities categorized neither as held-to-maturity nor trading which are intended be sold within one year from the balance sheet date or the normal operating cycle, whichever is longer.

+ References

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-Name Accounting Research Bulletin (ARB)

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+ Details

- Definition

The amount by which the fair value of an investment in debt and equity securities categorized as Available-for-sale is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income.

+ References+ Details

- Definition

The cash inflow associated with the sale of debt and equity securities classified as available-for-sale securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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+ Details