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Warranty Contracts (Tables) | 12 Months Ended
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Dec. 31, 2016
Warranty Contracts [Abstract] |
Schedule Of Recognized Warranty Revenue And Incurred Warranty Costs |
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿Warranty Revenue Recognition: |  |  |  |  |  |  |  |  |  |  |  |
﻿(in thousands) |  | Beginning Balance Deferred Warranty Revenue |  | Warranty Revenue Deferred |  | Warranty Revenue Recognized |  | Ending Balance Deferred Warranty Revenue
﻿Year Ended December 31, |  |  |  |  |  |  |  |  |  |  |  |
﻿2016 |  | $ | 10,663 |  | $ | 12,859 |  | $ | (14,471) |  | $ | 9,051
﻿2015 |  |  | 11,914 |  |  | 15,349 |  |  | (16,600) |  |  | 10,663
﻿2014 |  |  | 9,141 |  |  | 17,185 |  |  | (14,412) |  |  | 11,914
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿Warranty Costs Incurred: |  |  |  |  |  |  |  |  |  |  |  |
﻿(in thousands) |  |  |  |  | Materials |  | Labor and Overhead |  | Total
﻿Year Ended December 31, |  |  |  |  |  |  |  |  |  |  |  |
﻿2016 |  |  |  |  | $ | 6,851 |  | $ | 6,862 |  | $ | 13,713
﻿2015 |  |  |  |  |  | 6,202 |  |  | 5,559 |  |  | 11,761
﻿2014 |  |  |  |  |  | 5,958 |  |  | 5,440 |  |  | 11,398
﻿

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