EARNINGS PER SHARE (NVE) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2012	Jun. 30, 2011
Numerator
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 69,439		$ 12,888		$ 81,612	$ 15,218
Denominator
Weighted Average Shares of Common Stock Outstanding - basic	235,999,750		235,867,068		235,999,750	235,697,687
Per Share Amounts
Net income per share - basic	$ 0.29		$ 0.05		$ 0.35	$ 0.06
Numerator
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 69,439		$ 12,888		$ 81,612	$ 15,218
Denominator
Weighted Average Number of Shares Outstanding, Basic	235,999,750		235,867,068		235,999,750	235,697,687
Stock options (in shares)	38,237		42,199		36,760	37,799
Non-Employee Director stock plan (in shares)	160,257		122,737		156,972	143,319
Employee stock purchase plan (in shares)	2,725		2,528		6,807	3,551
Restricted Shares (in shares)	518,750		124,116		508,250	112,678
Performance Shares (in shares)	1,183,557		1,119,898		1,006,531	1,032,622
Weighted Average Number of Shares Outstanding, Diluted	237,903,276	[1]	237,278,546	[1]	237,715,070	237,027,656
Per Share Amounts
Net income per share - diluted	$ 0.29		$ 0.05		$ 0.34	$ 0.06
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	435,872		451,028		572,957	577,357

[1] The denominator does not include stock equivalents for options issued under the non-qualified stock option plan due to conversion prices being higher than market prices for all periods. If the conditions for conversion were met under this plan, 435,872 and 451,028 shares, would be included for the three and six months ended June 30, 2012, respectively, and 572,957 and 577,357 would be included for the three and six months ended June 30, 2011, respectively.