Note 16 - Fair Value Disclosure of Financial Instruments (Detail) (USD $)	Dec. 31, 2012	Dec. 31, 2011
	$ 36,825,000	$ 33,908,000
Estimates and Comps [Member] | Minimum [Member]
Assets, Fair Value Disclosure, Nonrecurring	1,100,000
Estimates and Comps [Member] | Maximum [Member]
Assets, Fair Value Disclosure, Nonrecurring	42,000,000
Fair Value, Inputs, Level 1 [Member]
	33,400,000
Fair Value, Inputs, Level 3 [Member]
	$ 3,400,000