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Stock Incentive Plans - Narrative (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Restricted Stock |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share based payment, vesting period (years) | 3 years |  |
Expected to vest one year from balance sheet date (in shares) | 237,866 |  |
Expected to vest two years from balance sheet date (in shares) | 139,152 |  |
Expected to vest three years from balance sheet date (in shares) | 32,005 |  |
Expected to vest four years from balance sheet (in shares) | 63,976 |  |
Unrecognized compensation cost | $ 2,900,000 |  |
Unrecognized compensation expense related to compensation awards, period for recognition (in months) | 22 months |  |
Compensation expense | $ 2,600,000 | $ 3,100,000 | $ 3,100,000
Number of shares, Granted (in shares) | 162,806 | 349,091 | 324,502
Weighted-average grant date fair value, Granted (in dollars per share) | $ 10.38 | $ 10.19 | $ 11.19
Number of shares, Vested (in shares) | 310,117 | 287,148 | 244,411
Performance Stock Units |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share based payment, vesting period (years) | 3 years |  |
Expected to vest one year from balance sheet date (in shares) | 243,022 |  |
Expected to vest two years from balance sheet date (in shares) | 287,477 |  |
Expected to vest three years from balance sheet date (in shares) | 266,033 |  |
Unrecognized compensation cost | $ 3,000,000.0 |  |
Unrecognized compensation expense related to compensation awards, period for recognition (in months) | 21 months |  |
Performance period | 3 years |  |
Maximum possible payout to executive officer as a percentage of the target award (as a percent) | 150.00% |  |
Compensation expense | $ 2,400,000 | $ 1,900,000 | $ 2,500,000
Compensation expense, forfeitures |  | $ 1,000,000.0 |
Number of shares, Granted (in shares) | 296,050 | 293,111 | 266,009
Weighted-average grant date fair value, Granted (in dollars per share) | $ 10.14 | $ 9.82 | $ 11.04
Number of shares, Vested (in shares) | 251,375 | 218,514 | 200,374
Long-Term Incentive Plan Unit |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Unrecognized compensation cost | $ 1,900,000 |  |
Unrecognized compensation expense related to compensation awards, period for recognition (in months) | 26 months |  |
Compensation expense | $ 700,000 | $ 0 | $ 0
Number of shares, Granted (in shares) | 281,925 |  |
Weighted-average grant date fair value, Granted (in dollars per share) | $ 10.65 |  |
Number of shares, Vested (in shares) | 0 |  |
2016 Equity Incentive Plan |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock option and Incentive plan, shares authorized (in shares) | 6,082,664 |  |
Number of shares issued or committed to issue (in shares) | 1,351,686 |  |
Maximum | Performance Stock Units |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Percentage of total stockholder return for payout of shares (as a percent) | 30.00% |  |
Minimum | Performance Stock Units | Executive Officer |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Percentage of total stockholder return for payout of shares (as a percent) | 75.00% |  |

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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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