Property And Equipment (Details) - USD ($) $ in Thousands |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
---|---|---|---|
Property, Plant and Equipment [Line Items] | |||
Total property and equipment | $ 816,112 | $ 810,079 | |
Accumulated depreciation | (403,104) | (379,869) | |
Property and equipment — net | 413,008 | 430,210 | $ 399,445 |
Land [Member] | |||
Property, Plant and Equipment [Line Items] | |||
Total property and equipment | 9,992 | 9,864 | |
Building and Improvements [Member] | |||
Property, Plant and Equipment [Line Items] | |||
Total property and equipment | 5,133 | 5,896 | |
Furniture and Fixtures [Member] | |||
Property, Plant and Equipment [Line Items] | |||
Total property and equipment | 11,998 | 10,587 | |
Operating Equipment [Member] | |||
Property, Plant and Equipment [Line Items] | |||
Total property and equipment | $ 788,989 | $ 783,732 |