Note 6 - Goodwill and Intangibles (Details Textual) - USD ($) $ in Thousands |
3 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Asset Impairment Charges | $ 21,003 | $ 1,593 | $ 6,915 | |
| Goodwill, Impairment Loss | 5,224 | |||
| Business Acquisition, Goodwill, Expected Tax Deductible Amount | $ 4,222 | $ 4,222 | 4,222 | |
| Finite-Lived Intangible Asset, Useful Life | 12 years 146 days | |||
| Amortization of Intangible Assets | $ 8,566 | $ 9,510 | $ 6,973 | |
| Acquired Finite-lived Intangible Asset, Residual Value | 0 | 0 | ||
| WD Services [Member] | ||||
| Goodwill, Impairment Loss | 5,224 | |||
| WD Services [Member] | Customer Relationships [Member] | ||||
| Asset Impairment Charges | $ 4,381 | $ 4,381 | ||