Note 1 - Basis of Presentation - Property and Equipment (Details) - USD ($) $ in Thousands |
6 Months Ended | |
---|---|---|
Jun. 30, 2017 |
Dec. 31, 2016 |
|
Property and equipment, gross | $ 699,815 | $ 655,487 |
Accumulated depreciation | (353,320) | (329,394) |
Total property and equipment, net | 346,495 | 326,093 |
Land [Member] | ||
Property and equipment, gross | 50,024 | 44,611 |
Building and Building Improvements [Member] | ||
Property and equipment, gross | $ 149,430 | 139,078 |
Building and Building Improvements [Member] | Minimum [Member] | ||
Estimated useful lives (Year) | 7 years | |
Building and Building Improvements [Member] | Maximum [Member] | ||
Estimated useful lives (Year) | 40 years | |
Equipment [Member] | ||
Property and equipment, gross | $ 500,361 | $ 471,798 |
Equipment [Member] | Minimum [Member] | ||
Estimated useful lives (Year) | 3 years | |
Equipment [Member] | Maximum [Member] | ||
Estimated useful lives (Year) | 20 years |