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LONG-TERM DEBT	6 Months Ended
LONG-TERM DEBT	Jun. 30, 2013
Debt Disclosure [Abstract]
LONG-TERM DEBT	LONG-TERM DEBT See our statements of capitalization for details on our long-term debt. In February 2013, our $22.0 million of 3.95% Senior Notes matured, and the outstanding principal balance was repaid. In December 2013, our 4.80% Senior Notes will mature. As a result, the $125.0 million balance of these notes was included in the current portion of long-term debt on our balance sheets.