Note 13 - Share-Based Compensation (Detail) - Summary of Information About Stock Options Outstanding (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Shares (in Shares)	614,917	671,500	699,790
Weighted Average Remaining Contractual Life (Years)	3 years 197 days
Weighted Average Exercise Price	$ 11.24
Option Set 1 | Minimum [Member]
Range of Exercise Price	$ 7.63
Option Set 1 | Maximum [Member]
Range of Exercise Price	$ 9.80
Option Set 1
Shares (in Shares)	198,882
Weighted Average Remaining Contractual Life (Years)	2 years 262 days
Weighted Average Exercise Price	$ 9.38
Option Set 2 | Minimum [Member]
Range of Exercise Price	$ 11.02
Option Set 2 | Maximum [Member]
Range of Exercise Price	$ 13.15
Option Set 2
Shares (in Shares)	403,535
Weighted Average Remaining Contractual Life (Years)	4 years 3 days
Weighted Average Exercise Price	$ 12.01
Option Set 3 | Minimum [Member]
Range of Exercise Price	$ 16.00
Option Set 3
Shares (in Shares)	12,500
Weighted Average Remaining Contractual Life (Years)	1 year 120 days
Weighted Average Exercise Price	$ 16.00
Minimum [Member]
Range of Exercise Price	$ 7.63
Maximum [Member]
Range of Exercise Price	$ 16.00