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Share-based Payments, Stock Option Activity (Details) - Stock Options [Member] - USD ($) | 12 Months Ended
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Mar. 31, 2022 | Mar. 31, 2021 | Mar. 31, 2020
Black-Scholes option pricing model assumptions used to derive the weighted average fair value of the stock options granted [Abstract] |  |  |
Weighted average risk free interest rate |  | 0.44% | 1.76%
Weighted average expected holding period |  | 5 years 11 months 15 days | 5 years 8 months 12 days
Weighted average expected volatility |  | 44.90% | 42.50%
Weighted average expected dividend yield |  | 0.00% | 0.00%
Weighted average fair value of options granted (in dollars per share) |  | $ 6.43 | $ 8.27
Number of Shares [Roll Forward] |  |  |
Outstanding at beginning of period (in shares) | 1,744,885 |  |
Granted (in shares) | 0 |  |
Exercised (in shares) | (35,429) |  |
Forfeited (in shares) | (13,957) |  |
Outstanding at end of period (in shares) | 1,695,499 | 1,744,885 |
Weighted Average Exercise Price [Roll Forward] |  |  |
Outstanding at beginning of period (in dollars per share) | $ 17.51 |  |
Granted (in dollars per share) | 0 |  |
Exercised (in dollars per share) | 15.07 |  |
Forfeited (in dollars per share) | 20.74 |  |
Outstanding at end of period (in dollars per share) | $ 17.53 | $ 17.51 |
Number of stock options unvested (in shares) | 314,359 |  |
Weighted average exercise price of stock options unvested (in dollars per share) | $ 16.52 |  |
Pre-tax intrinsic value of options exercised | $ 245,000 | $ 546,000 | $ 508,000
Fair value of vested stock options | $ 2,174,000 | $ 2,184,000 | $ 2,189,000
Closing stock price (in dollars per share) | $ 17.83 |  |
Total unrecognized compensation expense, options | $ 1,065,000 |  |
Weighted average vesting period over which compensation expense is expected to be recognized | 1 year |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |  |
Options outstanding, shares (in shares) | 1,695,499 |  |
Options outstanding, weighted average exercise price (in dollars per share) | $ 17.53 |  |
Options outstanding, weighted average remaining life | 4 years 10 months 2 days |  |
Options outstanding, aggregate intrinsic value | $ 5,657,000 |  |
Options exercisable, shares (in shares) | 1,381,140 |  |
Options exercisable, weighted average exercise price (in dollars per share) | $ 17.76 |  |
Options exercisable, weighted average remaining life | 4 years 1 month 20 days |  |
Options exercisable, aggregate intrinsic value | $ 5,061,000 |  |
$5.20 to $6.47 [Member] |  |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |  |
Exercise price of options, lower range (in dollars per share) | $ 5.20 |  |
Exercise price of options, upper range (in dollars per share) | $ 6.47 |  |
Options outstanding, shares (in shares) | 301,234 |  |
Options outstanding, weighted average exercise price (in dollars per share) | $ 6.46 |  |
Options outstanding, weighted average remaining life | 8 months 26 days |  |
Options exercisable, shares (in shares) | 301,234 |  |
Options exercisable, weighted average exercise price (in dollars per share) | $ 6.46 |  |
Options exercisable, weighted average remaining life | 8 months 26 days |  |
$6.48 to $18.20 [Member] |  |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |  |
Exercise price of options, lower range (in dollars per share) | $ 6.48 |  |
Exercise price of options, upper range (in dollars per share) | $ 18.20 |  |
Options outstanding, shares (in shares) | 504,241 |  |
Options outstanding, weighted average exercise price (in dollars per share) | $ 13.40 |  |
Options outstanding, weighted average remaining life | 6 years 7 days |  |
Options exercisable, shares (in shares) | 277,422 |  |
Options exercisable, weighted average exercise price (in dollars per share) | $ 11.93 |  |
Options exercisable, weighted average remaining life | 4 years 2 months 26 days |  |
$18.21 to $22.83 [Member] |  |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |  |
Exercise price of options, lower range (in dollars per share) | $ 18.21 |  |
Exercise price of options, upper range (in dollars per share) | $ 22.83 |  |
Options outstanding, shares (in shares) | 468,467 |  |
Options outstanding, weighted average exercise price (in dollars per share) | $ 19.59 |  |
Options outstanding, weighted average remaining life | 6 years 9 months 18 days |  |
Options exercisable, shares (in shares) | 380,927 |  |
Options exercisable, weighted average exercise price (in dollars per share) | $ 19.51 |  |
Options exercisable, weighted average remaining life | 6 years 8 months 8 days |  |
$22.84 to $28.04 [Member] |  |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |  |
Exercise price of options, lower range (in dollars per share) | $ 22.84 |  |
Exercise price of options, upper range (in dollars per share) | $ 28.04 |  |
Options outstanding, shares (in shares) | 192,233 |  |
Options outstanding, weighted average exercise price (in dollars per share) | $ 26.26 |  |
Options outstanding, weighted average remaining life | 4 years 6 months |  |
Options exercisable, shares (in shares) | 192,233 |  |
Options exercisable, weighted average exercise price (in dollars per share) | $ 26.26 |  |
Options exercisable, weighted average remaining life | 4 years 6 months |  |
$28.05 to $34.17 [Member] |  |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |  |
Exercise price of options, lower range (in dollars per share) | $ 28.05 |  |
Exercise price of options, upper range (in dollars per share) | $ 34.17 |  |
Options outstanding, shares (in shares) | 229,324 |  |
Options outstanding, weighted average exercise price (in dollars per share) | $ 29.62 |  |
Options outstanding, weighted average remaining life | 3 years 11 months 12 days |  |
Options exercisable, shares (in shares) | 229,324 |  |
Options exercisable, weighted average exercise price (in dollars per share) | $ 29.62 |  |
Options exercisable, weighted average remaining life | 3 years 11 months 12 days |  |

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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + 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 (d)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + 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 -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest exercisable or convertible options. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur. + 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 (e)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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