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Schedule of Valuation and Qualifying Accounts (Tables) | 12 Months Ended
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Dec. 31, 2013
Valuation And Qualifying Accounts [Abstract] |
chedule Of Valuation And Qualifying Accounts [Table Text Block] |
(a) (1) Financial statements of the Company filed as part of this report:
See Item 8 - Financial Statements and Supplementary Data.
(2) Financial statement schedule filed as part of this report:
Schedule II - Valuation Accounts
|  |  |  |  |  | Additions |  |  |  |
|  |  |  | Balance at |  |  |  |  |  |  |  | Balance at
|  |  |  | Beginning |  | Charges to |  |  |  |  |  | End of
(in thousands) |  | of Period |  | Operations |  | Other |  | Deductions |  | Period
Year ended December 31, 2013: |  |  |  |  |  |  |  |  |  |
| Allowance for doubtful accounts(1) | $ | 1,442 |  | 67 |  | — |  | 1,171 |  | 338
Year ended December 31, 2012: |  |  |  |  |  |  |  |  |  |
| Allowance for doubtful accounts(1) | $ | 1,094 |  | 407 |  | 13 |  | 72 |  | 1,442
Year ended December 31, 2011: |  |  |  |  |  |  |  |  |  |
| Allowance for doubtful accounts(1) | $ | 586 |  | 546 |  | (23) |  | 15 |  | 1,094
(1) | Deductions in the allowance for doubtful accounts represent write-offs, net of recoveries, of amounts determined to be |  |
| uncollectible. |  |

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