NOTES PAYABLE TO BANKS (Detail Textuals) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Aug. 31, 2010
Revolving credit facility
Line of Credit Facility [Line Items]
Percentage of ownership		100.00%
Description of variable rate basis of debt instrument	The Base Rate, which is the highest of Bank of America's "prime rate" for the day of the borrowing, a fluctuating rate per annum equal to the Federal Funds Rate plus 0.50%, and a rate per annum equal to the one (1) month LIBOR rate plus 1.00%; in each case plus a margin that ranges from 0.25% to 1.25% based on a quarterly debt covenant calculation; or with respect to any Eurodollar borrowings, Adjusted LIBOR (which equals LIBOR as increased to account for the maximum reserve percentages established by the U.S. Federal Reserve) plus a margin ranging from 1.25% to 2.25%, based upon a quarterly debt covenant calculation.
Replaced credit facility		$ 200
Amount of credit facility		350
Loan origination fees and other debt related costs	2.3
Term of line of credit facility	5 years
Revolving credit facility | Minimum
Line of Credit Facility [Line Items]
Fees on unused portion of facility	0.25%
Revolving credit facility | Maximum
Line of Credit Facility [Line Items]
Fees on unused portion of facility	0.35%
Revolving credit facility | Option 1 A
Line of Credit Facility [Line Items]
Basis spread on variable rate	0.50%
Description of reference rate basis	prime rate
Revolving credit facility | Option 1 A | Minimum
Line of Credit Facility [Line Items]
Range of margin based on quarterly debt covenant calculation	0.25%
Revolving credit facility | Option 1 A | Maximum
Line of Credit Facility [Line Items]
Range of margin based on quarterly debt covenant calculation	1.25%
Revolving credit facility | Option 1 B
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.00%
Description of reference rate basis	LIBOR rate
Revolving credit facility | Option 1 B | Minimum
Line of Credit Facility [Line Items]
Range of margin based on quarterly debt covenant calculation	0.25%
Revolving credit facility | Option 1 B | Maximum
Line of Credit Facility [Line Items]
Range of margin based on quarterly debt covenant calculation	1.25%
Letter of credit subfacility
Line of Credit Facility [Line Items]
Amount of credit facility		50
Letter of swingline subfacility
Line of Credit Facility [Line Items]
Amount of credit facility		$ 25