SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Unrealized Gains and Losses (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Changes in the balance of each component of accumulated other comprehensive earnings
Tax rate used (as a percent)			35.00%
Changes in the balance of each component of accumulated other comprehensive earnings
Beginning balance			$ 136,027
Net current-period other comprehensive earnings (loss)	(12,353)	(1,946)	25,318	(17,874)
Ending balance	161,345		161,345
Unrealized Gains and Losses on Available-for-Sale Securities
Changes in the balance of each component of accumulated other comprehensive earnings
Beginning balance	173,698	127,242	136,027	143,170
Other comprehensive earnings before reclassifications	(8,642)	5,203	40,032	(5,354)
Amounts reclassified from accumulated other comprehensive earnings	(3,711)	(7,149)	(14,714)	(12,520)
Net current-period other comprehensive earnings (loss)	(12,353)	(1,946)	25,318	(17,874)
Ending balance	$ 161,345	$ 125,296	$ 161,345	$ 125,296

- Definition

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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