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Industry Segments (Details 2) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013
Corporate Overhead Footnote |  |  |  |
General and administrative expense | $ 8,821 | $ 10,195 | $ 30,279 | $ 30,470
Depreciation and amortization | 394 | 582 | 1,475 | 1,742
Interest expense | 4,969 | 4,112 | 14,110 | 12,354
Other general corporate (income) expense, net | 1,683 | 665 | 2,963 | 1,859
Total | $ 15,867 | $ 15,554 | $ 48,827 | $ 46,425

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