| **Operating Lease Commitments (Schedule Of Future Minimum Annual Payments On Operating Leases) (Details) (USD $)** | 12 Months Ended   |
|--------------------------------------------------------------------------------------------------------------------|-------------------|
||
| **Operating Lease Commitments**                                                                                    |              |   |   |
| Lease expiration date                                                                                              | Dec. 31,				 2021 |   |   |
| Rent expenses under operating leases                                                                               | $ 15,700,000      | $ 14,200,000 | $ 12,800,000 |
| 2014                                                                                                               | 12,689,000        |   |   |
| 2015                                                                                                               | 8,554,000         |   |   |
| 2016                                                                                                               | 6,017,000         |   |   |
| 2017                                                                                                               | 3,663,000         |   |   |
| 2018                                                                                                               | 2,942,000         |   |   |
| Thereafter                                                                                                         | 12,107,000        |   |   |
| Future minimum annual payments on operating leases                                                                 | $ 45,972,000      |   |   |

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Date which lease or group of leases is set to expire, in CCYY-MM-DD format.
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| - Definition
Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.
+ References
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| - Definition
Amount of required minimum rental payments maturing in the next fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.
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Amount of required minimum rental payments maturing in the fifth fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.
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Amount of required minimum rental payments maturing in the forth fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.
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Amount of required minimum rental payments maturing in the third fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.
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Amount of required minimum rental payments maturing in the second fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.
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| - Definition
Amount of required minimum rental payments maturing after the fifth fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.
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| - Definition
Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.
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