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Industry Segments (Details 2) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015
Corporate Overhead Footnote |  |  |  |
General and administrative expense | $ 8,021 | $ 11,688 | $ 17,950 | $ 20,537
Depreciation and amortization | 112 | 254 | 226 | 512
Interest expense | 5,596 | 4,415 | 11,647 | 9,412
Other general corporate (income) expense, net | 2,450 | 914 | 2,740 | 1,376
Total | $ 16,179 | $ 17,271 | $ 32,563 | $ 31,837

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