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Valuation And Qualifying Accounts (Details) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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Allowance For Doubtful Accounts [Member]
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| Valuation and Qualifying Accounts Disclosure [Line Items] | |||
| Balance at beginning of year | $ 209 | $ 53 | $ 58 |
| Additions charged to costs and expenses | 505 | 367 | 153 |
| Deductions | 339 | 211 | 158 |
| Balance at end of year | 375 | 209 | 53 |
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Tax Valuation Allowance [Member]
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| Valuation and Qualifying Accounts Disclosure [Line Items] | |||
| Balance at beginning of year | 37,903 | 38,461 | 54,513 |
| Deductions | 2,920 | 558 | 16,052 |
| Balance at end of year | $ 34,983 | $ 37,903 | $ 38,461 |