Note 10 - Stock Repurchase Program (Details) - Stock Repurchase Program (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Stock Repurchase Program [Abstract]
Shares Repurchased		663,802
Average Price Per Share	$ 32.38	$ 31.06
Amount Repurchased		$ 20,615
Repurchases	323,789
Repurchases	$ 35.08
Repurchases	11,358
Shares Repurchased	987,591
Average Price Per Share	$ 32.38	$ 31.06
Amount Repurchased	$ 31,973