| **Stockholders' Equity (Tables)**                                           | 9 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                  |
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| **Stockholders' Equity Note [Abstract]**                                    |                                                                                                                                                                                                                                                                                                                                                                                                                            |
| Schedule of Share-based Compensation, Restricted Stock Units Award Activity | A summary of nonvested restricted stock award activity under the Stock Option Plan as of September 30, 2016 and changes during the period then ended is presented below: Shares (in thousands) WeightedAverageGrant DateFair ValueNonvested at December 31, 20151,495 $11.08Granted580 $17.68Vested(284) $10.41Forfeited(3) $15.93Nonvested at September 30, 20161,788 $13.32 |

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| - Definition
Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year.
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