COMMON STOCK (Details 5) (USD $)	12 Months Ended
	Dec. 31, 2011 D quarter	Dec. 31, 2010	Dec. 31, 2009
Dividends
Expected dividend per share after suspension period (in dollars per share)	$ 0.25
Period of suspension of dividend (in quarters)	2
First quarterly dividend paid excluded from EDE Mortgage covenant	$ 98,000
Cumulative aggregate amount up to which the entity may declare or pay any dividends as per EDE Mortgage covenant	10,750,000
Maximum period for payment of dividend after the related date of declaration or notice of dividend as per EDE Mortgage covenant (in days)	60
Numerator for ratio of total indebtedness to total capitalization, maximum	0.625
Denominator for ratio of total indebtedness to total capitalization, maximum	1
Retained earnings balance	33,707,000	5,468,000
Dividends paid	$ 26,732,000	$ 51,996,000	$ 44,807,000
401 (k) plan and ESOP
401 (k) plan and ESOP
Maximum percentage of annual compensation to be deferred by participating employees	25.00%
Percentage of each employee's deferrals to be matched	50.00%
Maximum matching contribution as a percentage of employee's eligible compensation	3.00%
Shares available to be issued	36,038	104,601
Shares contributed	68,523	64,830	73,408