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Contingencies (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Contingencies [Abstract] |  |  |
Rent expense | $ 40,200 | $ 38,400 | $ 39,800
Future mimimum property lease commitments [Abstract] |  |  |
2016 | 36,700 |  |
2017 | 31,100 |  |
2018 | 20,600 |  |
2019 | 14,300 |  |
2020 | 11,600 |  |
Thereafter | 32,500 |  |
Total future minimum property lease commitments | 146,800 |  |
Product Warranty Disclosure [Abstract] |  |  |
Balance at beginning of year | 9,537 | 14,336 | 9,755
Additions charged to costs and expenses | 14,284 | 13,396 | 20,387
Deductions | (13,059) | (18,078) | (15,697)
Other | (579) | (117) | (109)
Balance at end of year | 10,183 | $ 9,537 | $ 14,336
Outstanding surety bonds | $ 505,000 |  |

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