Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Assets
Allowance for doubtful accounts	$ 2,789	$ 2,990
Accumulated depreciation	130,029	132,807
Accumulated amortization	$ 36,849	$ 28,930
Shareholders’ Equity:
Preferred stock, shares authorized	500,000	500,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, shares authorized	70,000,000	70,000,000
Common stock, shares issued	40,855,000	41,797,000
Common stock, shares outstanding	40,855,000	41,797,000
Common stock, no par value	$ 0	$ 0