6. INTEREST RATE SWAP CONTRACT (Detail) (USD $)	9 Months Ended
	Sep. 30, 2012	Dec. 31, 2011
Derivative, Fixed Interest Rate	7.57%
Derivative, Basis Spread on Variable Rate	2.45%
Derivative, Description of Variable Rate Basis	one-month LIBOR Rate times the same notional amount
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax	$ 2,066,000	$ 1,975,000
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	91,000
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax, Portion Attributable to Noncontrolling Interest	$ 45,500