NOTES PAYABLE TO BANKS (Detail Textuals 2) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Line of Credit Facility [Line Items]
Threshold limit of ratio of debt to earnings before interest taxes depreciation and amortization	no more than 2.5 to 1
Debt-to-EBITDA ratio (in times)	2.5
Threshold limit of ratio of earnings before interest taxes depreciation and amortization to interest expenses	no less than 2 to 1
EBITDA to interest expense ratio (in times)	2
Outstanding borrowings under the facility	$ 87.6
Remaining borrowing capacity	244.4
Letter of credit subfacility
Line of Credit Facility [Line Items]
Outstanding borrowings under the facility	$ 18.0