Note 13 - Stock Repurchase	9 Months Ended
Sep. 30, 2016
Notes to Financial Statements
Common Stock Repurchases [Text Block]	13. STOCK REPURCHASE In July 2013, the Board of Directors approved a stock repurchase program that authorized the Company to repurchase up to $100 million in the aggregate of its common stock through June 30, 2015. In April 2015, the Board of Directors approved an extension of the program through December 31, 2015. The stock repurchase program expired as of December 31, 2015 with a remaining unused balance of $5.9 million. Shares were retired upon repurchase under the program. In February 2016, the Board of Directors approved a new stock repurchase program that authorized the Company to repurchase up to $50 million in the aggregate of its common stock through December 31, 2016. Shares are retired upon repurchase under the program. The Company did not repurchase any shares for the three and nine months ended September 30, 2016. For the three months ended September 30, 2015, the Company repurchased 0.3 million shares for $13.6 million at an average price of $47.93 per share. For the nine months ended September 30, 2015, the Company repurchased 0.6 million shares for $31.7 million at an average price of $50.01 per share.

13. STOCK REPURCHASE

In July 2013, the Board of Directors approved a stock repurchase program that authorized the Company to repurchase up to $100 million in the aggregate of its common stock through June 30, 2015. In April 2015, the Board of Directors approved an extension of the program through December 31, 2015. The stock repurchase program expired as of December 31, 2015 with a remaining unused balance of $5.9 million. Shares were retired upon repurchase under the program.

In February 2016, the Board of Directors approved a new stock repurchase program that authorized the Company to repurchase up to $50 million in the aggregate of its common stock through December 31, 2016. Shares are retired upon repurchase under the program.

The Company did not repurchase any shares for the three and nine months ended September 30, 2016. For the three months ended September 30, 2015, the Company repurchased 0.3 million shares for $13.6 million at an average price of $47.93 per share. For the nine months ended September 30, 2015, the Company repurchased 0.6 million shares for $31.7 million at an average price of $50.01 per share.