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Compensation Plans - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jan. 31, 2020 | Jan. 31, 2019 | Jan. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | May 01, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Stock Repurchase Program, Number of Shares Authorized to be Repurchased |  |  |  | 552,158 |  |  | 2,000,000
Share-based compensation expense |  |  |  | $ 4,032 | $ 3,452 | $ 3,427 |
Tax benefit from compensation expense |  |  |  | $ 500 | 1,600 | 2,100 |
Award vesting period |  |  |  | 3 years |  |  |
Total unrecognized compensation cost for nonvested stock units |  |  |  | $ 4,600 |  |  |
Number of shares issued upon completion of performance cycle |  | 99,308 | 134,600 |  |  |  |
Employee minimum age to participate in plan |  |  |  | 21 years |  |  |
Company contributions, amount charged to expense |  |  |  | $ 3,200 | $ 2,800 | 2,000 |
Preferred stock, shares authorized |  |  |  | 5,000,000 | 5,000,000 |  |
Preferred stock, par value |  |  |  | $ 0.01 | $ 0.01 |  |
Preferred stock, shares outstanding |  |  |  | 0 | 0 |  |
Expected years to recognize unearned compensation |  |  |  | 2 years |  |  |
Stock Options |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Contractual term |  |  |  | 10 years |  |  |
Stock Appreciation Rights (SSARs) |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Award vesting period |  |  |  | 5 years |  |  |
Contractual term |  |  |  | 10 years |  |  |
Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Share-based compensation expense |  |  |  | $ 1,969 | $ 1,211 | 898 |
Total unrecognized compensation cost for nonvested stock units |  |  |  | $ 3,417 | $ 2,175 | $ 837 |
Number of shares issued |  |  |  | 77,227 |  |  |
Expected years to recognize unearned compensation |  |  |  | 1 year 10 months 24 days | 2 years | 1 year 9 months 18 days |
Restricted Stock [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Share-based compensation expense |  |  |  | $ 0 | $ 0 | $ 78 |
Performance Shares [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Share-based compensation expense |  |  |  | $ 1,699 | 2,067 | 2,451 |
Share-based compensation expense, retiring executive |  |  |  |  | 100 |  |
Employee Stock [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent |  |  |  | 85.00% |  |  |
Share-based compensation expense |  |  |  | $ 364 | $ 174 | $ 0 |
Number of shares authorized |  |  |  | 750,000 |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period |  |  |  | 41,116 | 14,799 |  |
Minimum | Stock Options |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Award vesting period |  |  |  | 3 years |  |  |
Minimum | Restricted Stock [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Award vesting period |  |  |  | 2 years |  |  |
Maximum | Stock Options |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Award vesting period |  |  |  | 5 years |  |  |
Maximum | Restricted Stock [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Award vesting period |  |  |  | 5 years |  |  |
Stock Plan for Non-Management Directors |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Number of shares available for grant |  |  |  | 96,031 | 7,413 |  |
Number of shares authorized |  |  |  | 200,000 |  |  |
Deferred Compensation Plan [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Rate |  |  |  | 25.00% |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Rate, Bonus |  |  |  | 100.00% |  |  |
Deferred Compensation Plan Assets |  |  |  | $ 3,500 |  |  |
Deferred Compensation Liability, Current and Noncurrent |  |  |  | $ 4,900 |  |  |
Subsequent Event |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Number of shares issued upon completion of performance cycle | 62,649 |  |  |  |  |  |

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