| **Stockholders' Equity (Tables)**                                                                                                                       | 6 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
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| **Stockholders' Equity Note [Abstract]**                                                                                                                |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding and Exercisable [Table Text Block] |        Weighted       Weighted Average Aggregate     Average Remaining  Intrinsic     Exercise  Contractual Value   Shares Price Term (in thousands) Outstanding at January 1, 2012 1,087 $ 7.27      Exercised (188) $ 7.26      Forfeited (5) $ 6.93      Expired (11) $ 6.14     Outstanding at June 30, 2012 883 $ 7.29 3.76 years $ 1,124 Exercisable at June 30, 2012 810 $ 7.33 3.50 years $ 1,008 |
| Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block]                                                          |      Weighted      Average      Grant Date   Shares Fair Value  Nonvested at January 1, 2012 1,556$6.89   Granted 420$10.53   Vested (984)$4.87   Forfeited (2)$8.80  Nonvested at June 30, 2012 990$10.42                                                                                                                                                                                                                                                                                                                                                                                    |
| Schedule of Share-based Compensation [Table Text Block]                                                                                                 |    2012 2011 Employee share-based compensation expense$ 2,831  2,968 Adjustment to fair value of liability classified awards  (236)  (128)   Total share-based compensation expense$ 2,595  2,840                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |

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| - Definition
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No definition available.
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| - Definition
Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 718 -SubTopic 10 -Publisher FASB -Number  -Article  -Subparagraph (c)(1) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901
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| - Definition
Tabular disclosure of the number of fully vested share options (or share units) and share options expected to vest at the date of the latest statement of financial position, weighted-average exercise price (or conversion ratio), aggregate intrinsic value (except for nonpublic entities), and weighted-average remaining contractual term for both options (or share units) currently outstanding and options (or share units) exercisable (or convertible).
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 718 -SubTopic 10 -Publisher FASB -Number  -Article  -Subparagraph (e) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901
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