Note 11 - Stock-Based Compensation (Detail) - Phantom Stock Plan: (USD $)	12 Months Ended
	Dec. 31, 2012
Shares	39,255
Fair Value (in Dollars per share)	$ 12.63
Vested at December 31, 2012	49,794
Vested at December 31, 2012 (in Dollars per share)	$ 15.34
Granted	11,632
Granted (in Dollars per share)	$ 13.31
Distributions	(820)
Distributions (in Dollars per share)	$ 14.09
Shares	50,067
Fair Value (in Dollars per share)	$ 15.34