Note 1 - Condensed Consolidated Financial Statements - Business Overview, Recent Developments and Significant Accounting Policies Significant Accounting Policies (Details) - USD ($) $ in Thousands		Jan. 01, 2019	Mar. 31, 2019		Dec. 31, 2018
Operating Lease, Liability, Not Yet Commenced			$ 0
Operating Lease, Right-of-Use Asset	[2]		$ 47,150	[1]	$ 0
ASU 2016-02
Increase (Decrease) in Other Liabilities		$ 73,500
Increase (Decrease) in Other Assets		73,500
Adjustment for Unamortized Allowances and Incentives		24,100
Operating Lease, Right-of-Use Asset	[2]	$ 49,400

[1] Classified in other assets in our condensed consolidated balance sheets. See Note 8.

[2] Represents right-of-use assets recognized as a result of our adoption, as of January 1, 2019, of the new accounting and disclosure requirements for leases of property, plant and equipment. See Note 1 for additional information. Right-of-use assets are shown less accumulated amortization of $2.3 million at March 31, 2019.