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Stock-Based Compensation (Tables) | 3 Months Ended
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Mar. 31, 2018
Share-based Compensation [Abstract] |
Schedule of Nonvested Share Activity | The following table summarizes the restricted stock award, deferred stock units, and performance unit award activity for the period ended March 31, 2018:
|  | Restricted Stock |  | Deferred Stock Units |  | Performance Stock Units |  | Weighted Average Grant Date Fair Value
Outstanding at December 31, 2017 |  | 186,806 |  |  | 26,860 |  |  | 181,341 |  |  | $ | 16.53 |
Granted |  | 47,905 |  |  | 2,230 |  |  | 62,714 |  |  | 27.02 |
Vested |  | (35,946 | ) |  | — |  |  | — |  |  | 28.27 |
Adjustment for incentive awards expected to vest |  | — |  |  | — |  |  | (2,406 | ) |  | 15.68 |
Cancelled and forfeited |  | (14,425 | ) |  | — |  |  | (11,880 | ) |  | 15.60 |
Outstanding at March 31, 2018 |  | 184,340 |  |  | 29,090 |  |  | 229,769 |  |  | $ | 18.43 |

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- Definition Tabular disclosure of the changes in outstanding nonvested shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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