Matters Concerning Shareholders' Equity - Additional Information (Detail) | Apr. 19, 2017USD ($)$ / sharesshares | Apr. 12, 2017$ / shares | Apr. 03, 2017USD ($)Award_plan | Sep. 27, 2016Right$ / shares | Nov. 26, 2016USD ($)shares | Feb. 25, 2017USD ($)$ / sharesshares | Feb. 27, 2016USD ($)$ / sharesshares | Feb. 28, 2015USD ($)$ / sharesshares | Jun. 25, 2015shares | Mar. 01, 2014shares | Mar. 23, 2006shares |
Share Based Compensation Arrangements and Share Repurchase Plan [Line Items] | | | | | | | | | | | |
Prior period authorized aggregate number of shares available for issuance | shares | | | | | | 4,608,808 | | | | | |
Realized tax benefit related to stock-based compensation | $ | | | | | | $ 1,783,000 | $ 1,270,000 | $ 5,856,000 | | | |
Excess tax benefit related to stock-based compensation | $ | | | | | | $ 312,000 | $ 585,000 | $ 2,936,000 | | | |
Outstanding options exercisable | shares | | | | | | 107,800 | 1,176,974 | 1,419,712 | | 1,830,900 | |
Options exercised, Shares | shares | | | | | | 966,500 | 77,500 | 187,625 | | | |
Percentage of non-employee directors contribution to stock purchase plan | | | | | | 100.00% | | | | | |
Percentage of company contributes to stock purchase plan | | | | | | 25.00% | | | | | |
Company contributions to the plan | $ | | | | | | $ 363,000 | $ 424,000 | $ 465,000 | | | |
Preferred stock, restated certificate of incorporation authorized | shares | | | | | | 20,000,000 | | | | | |
Par value of preferred stock | $ / shares | | | | | | $ 1 | | | | | |
Preferred stock issued, shares | shares | | | | | | 0 | | | | | |
Cash dividends paid | $ | | | | | | $ 22,501,000 | $ 23,672,000 | $ 21,627,000 | | | |
Common stock, dividends, per share | $ / shares | | | | | | $ 0.28 | $ 0.28 | $ 0.24 | | | |
Dividend right payable record date | | | | Oct. 7, 2016 | | Apr. 26, 2017 | | | | | |
Dividends payable, date to be paid | | | | | | May 10, 2017 | | | | | |
Cost of shares repurchased | $ | | | | | | $ 10,566,000 | $ 75,000,000 | $ 173,932,000 | | | |
Number of dividend right declared to common stock holders | Right | | | | 1 | | | | | | | |
Exercise price per right | $ / shares | | | | $ 17.50 | | | | | | | |
Rights exercisable conditions | | | | | | The Rights become exercisable if any person or group acquires 10% or more of the Company's common stock (in which case, they would become an "acquiring person") or announces a tender offer for the Company, subject to certain exceptions set forth in the Rights Agreement. Shareholders who beneficially owned 10% or more of the Company's common stock immediately prior to the announcement of the Rights Agreement will not be an "acquiring person" unless they acquire beneficial ownership of an additional 1% of the Company's outstanding common stock. | | | | | |
Additional conditions for beneficial ownership percentage | | | | 1.00% | | | | | | | |
Conditions for beneficial ownership percentage | | | | 10.00% | | | | | | | |
Maximum | | | | | | | | | | | |
Share Based Compensation Arrangements and Share Repurchase Plan [Line Items] | | | | | | | | | | | |
Percentage of associate contribution to stock purchase plan | | | | | | 20.00% | | | | | |
Maximum acquiring beneficial ownership percentage without right restrictions | | | | 10.00% | | | | | | | |
Subsequent Event | | | | | | | | | | | |
Share Based Compensation Arrangements and Share Repurchase Plan [Line Items] | | | | | | | | | | | |
Number of restricted stock award forms | Award_plan | | | 2 | | | | | | | | |
Common stock, dividends, per share | $ / shares | | $ 0.07 | | | | | | | | | |
Share Repurchase Program April 2014 | Subsequent Event | | | | | | | | | | | |
Share Based Compensation Arrangements and Share Repurchase Plan [Line Items] | | | | | | | | | | | |
Share repurchase program authorized amount | $ | $ 200,000,000 | | | | | | | | | | |
Common stock repurchased under Share repurchase plan | shares | 45,000 | | | | | | | | | | |
Weighted Average Cost | $ / shares | $ 6.91 | | | | | | | | | | |
Amount remained for repurchase | $ | $ 36,299,000 | | | | | | | | | | |
Cost of shares repurchased | $ | $ 311,000 | | | | | | | | | | |
President And Chief Executive Officer | Subsequent Event | | | | | | | | | | | |
Share Based Compensation Arrangements and Share Repurchase Plan [Line Items] | | | | | | | | | | | |
Grant date fair value of the stock options | $ | | | $ 1,000,000 | | | | | | | | |
Grant date fair value of the stock options pricing model | | | Black-Scholes option pricing model | | | | | | | | |
Grant date fair value of the stock options, Term | | | 10 years | | | | | | | | |
President And Chief Executive Officer | Subsequent Event | Third Anniversary | | | | | | | | | | | |
Share Based Compensation Arrangements and Share Repurchase Plan [Line Items] | | | | | | | | | | | |
Stock option vesting percentage | | | 25.00% | | | | | | | | |
President And Chief Executive Officer | Subsequent Event | Fourth Anniversary | | | | | | | | | | | |
Share Based Compensation Arrangements and Share Repurchase Plan [Line Items] | | | | | | | | | | | |
Stock option vesting percentage | | | 25.00% | | | | | | | | |
President And Chief Executive Officer | Subsequent Event | Fifth Anniversary | | | | | | | | | | | |
Share Based Compensation Arrangements and Share Repurchase Plan [Line Items] | | | | | | | | | | | |
Stock option vesting percentage | | | 50.00% | | | | | | | | |
Restricted Stock Two | Subsequent Event | | | | | | | | | | | |
Share Based Compensation Arrangements and Share Repurchase Plan [Line Items] | | | | | | | | | | | |
Restricted stock award grand date fair value | $ | | | $ 2,000,000 | | | | | | | | |
Restricted Stock Awards | | | | | | | | | | | |
Share Based Compensation Arrangements and Share Repurchase Plan [Line Items] | | | | | | | | | | | |
Weighted average grant date fair value | $ / shares | | | | | | $ 6 | | | | | |
Unvested shares of restricted stock awards outstanding | shares | | | | | | 2,710,011 | 1,333,346 | | | | |
Shares awarded | shares | | | | | | 1,913,388 | | | | | |
Awards other than options vested in period | shares | | | | | | 160,904 | | | | | |
Awards other than options forfeited in period | shares | | | | | | 375,819 | | | | | |
Recorded stock-based compensation expense | $ | | | | | | $ 8,180,000 | $ 4,978,000 | 7,240,000 | | | |
Total unrecognized compensation expense related to unvested stock option awards | $ | | | | | | $ 20,038,000 | | | | | |
Weighted average period for recognizing unrecognized compensation expense, in years | | | | | | 1 year 6 months | | | | | |
Total fair value of awards vested | $ | | | | | | $ 3,671,000 | 2,510,000 | 7,098,000 | | | |
Restricted Stock Awards | Former Chief Executive Officer | Termination Agreement | | | | | | | | | | | |
Share Based Compensation Arrangements and Share Repurchase Plan [Line Items] | | | | | | | | | | | |
Additional expense for accelerated vesting of unvested restricted stock awards | $ | | | | | $ 3,908,000 | | | | | | |
Restricted stock awards, accelerated vesting, shares | shares | | | | | 570,000 | | | | | | |
Employee Stock Option | | | | | | | | | | | |
Share Based Compensation Arrangements and Share Repurchase Plan [Line Items] | | | | | | | | | | | |
Recorded stock-based compensation expense | $ | | | | | | 48,000 | 87,000 | 92,000 | | | |
Total unrecognized compensation expense related to unvested stock option awards | $ | | | | | | $ 30,000 | | | | | |
Weighted average period for recognizing unrecognized compensation expense, in years | | | | | | 2 years 4 months 24 days | | | | | |
Weighted average remaining contractual term for outstanding options, in years | | | | | | 2 years 3 months 18 days | | | | | |
Weighted average remaining contractual term for exercisable options, in years | | | | | | 1 year 3 months 18 days | | | | | |
Aggregate intrinsic value for outstanding options | $ | | | | | | $ 26,300 | | | | | |
Aggregate intrinsic value for exercisable options | $ | | | | | | 26,300 | | | | | |
Total intrinsic value of options exercised | $ | | | | | | $ 1,137,000 | $ 430,000 | 1,101,000 | | | |
Time-Based Long-Term Incentive Awards | | | | | | | | | | | |
Share Based Compensation Arrangements and Share Repurchase Plan [Line Items] | | | | | | | | | | | |
Vesting period, years | | | | | | 3 years | | | | | |
Percentage of award vested in year one | | | | | | 33.00% | | | | | |
Percentage of award vested in year two | | | | | | 33.00% | | | | | |
Percentage of award vested in year three | | | | | | 34.00% | | | | | |
Expense per share | $ / shares | | | | | | $ 6.99 | | | | | |
Performance-Based Long-Term Incentive Awards | | | | | | | | | | | |
Share Based Compensation Arrangements and Share Repurchase Plan [Line Items] | | | | | | | | | | | |
Weighted average grant date fair value | $ / shares | | | | | | $ 5.60 | | | | | |
Performance-Based Long-Term Incentive Awards | Performance Based Granted in Prior Period | | | | | | | | | | | |
Share Based Compensation Arrangements and Share Repurchase Plan [Line Items] | | | | | | | | | | | |
Stock option vesting percentage | | | | | | 80.00% | | | | | |
Weighted average grant date fair value | $ / shares | | | | | | $ 6.41 | | | | | |
Performance Shares | | | | | | | | | | | |
Share Based Compensation Arrangements and Share Repurchase Plan [Line Items] | | | | | | | | | | | |
Expense per share | $ / shares | | | | | | $ 4.98 | | | | | |
Percentage of increase or decrease on total shareholder return | | | | | | 10.00% | | | | | |
Performance Shares | Former Chief Executive Officer | Termination Agreement | | | | | | | | | | | |
Share Based Compensation Arrangements and Share Repurchase Plan [Line Items] | | | | | | | | | | | |
Restricted stock awards, accelerated vesting, shares | shares | | | | | 240,000 | | | | | | |
Performance Shares | Restricted Stock Two | Subsequent Event | | | | | | | | | | | |
Share Based Compensation Arrangements and Share Repurchase Plan [Line Items] | | | | | | | | | | | |
Percentage of restricted stock award forms | | | 75.00% | | | | | | | | |
Director Deferred Stock Units | | | | | | | | | | | |
Share Based Compensation Arrangements and Share Repurchase Plan [Line Items] | | | | | | | | | | | |
Shares awarded | shares | | | | | | 146,850 | | | | | |
Percentage of matching contribution to annual retainer fees deferred | | | | | | 25.00% | | | | | |
Deferred compensation arrangement shares deferred, but not delivered | shares | | | | | | 532,100 | 385,250 | | | | |
Stock units delivered | shares | | | | | | 0 | | | | | |
Compensation expense for director deferred stock awards | $ | | | | | | $ 834,000 | $ 800,000 | $ 826,000 | | | |
Time-Based Restricted Shares | Former Chief Executive Officer | Termination Agreement | | | | | | | | | | | |
Share Based Compensation Arrangements and Share Repurchase Plan [Line Items] | | | | | | | | | | | |
Restricted stock awards, accelerated vesting, shares | shares | | | | | 180,000 | | | | | | |
Time-Based Restricted Shares | Restricted Stock One | Subsequent Event | | | | | | | | | | | |
Share Based Compensation Arrangements and Share Repurchase Plan [Line Items] | | | | | | | | | | | |
Vesting period, years | | | 3 years | | | | | | | | |
Restricted stock award grand date fair value | $ | | | $ 500,000 | | | | | | | | |
Time-Based Restricted Shares | Restricted Stock Two | Subsequent Event | | | | | | | | | | | |
Share Based Compensation Arrangements and Share Repurchase Plan [Line Items] | | | | | | | | | | | |
Percentage of restricted stock award forms | | | 25.00% | | | | | | | | |
Employment Inducement Award | Former Chief Executive Officer | | | | | | | | | | | |
Share Based Compensation Arrangements and Share Repurchase Plan [Line Items] | | | | | | | | | | | |
Outstanding options exercisable | shares | | | | | | | 944,000 | | | | |
Options exercised, Shares | shares | | | | | | 944,000 | | | | | |
2015 Stock Incentive Plan | | | | | | | | | | | |
Share Based Compensation Arrangements and Share Repurchase Plan [Line Items] | | | | | | | | | | | |
Prior period authorized aggregate number of shares available for issuance | shares | | | | | | 3,951,914 | | | 2,500,000 | | |
2015 Stock Incentive Plan | Employee Stock Option | | | | | | | | | | | |
Share Based Compensation Arrangements and Share Repurchase Plan [Line Items] | | | | | | | | | | | |
Vesting period, years | | | | | | 4 years | | | | | |
Term from date of grant, years | | | | | | 10 years | | | | | |
2006 Stock Incentive Plan | | | | | | | | | | | |
Share Based Compensation Arrangements and Share Repurchase Plan [Line Items] | | | | | | | | | | | |
Outstanding options exercisable | shares | | | | | | 107,800 | 232,974 | | | | |
2006 Stock Incentive Plan | Maximum | | | | | | | | | | | |
Share Based Compensation Arrangements and Share Repurchase Plan [Line Items] | | | | | | | | | | | |
Prior period authorized aggregate number of shares available for issuance | shares | | | | | | | | | 3,009,974 | | 2,507,407 |
2006 Stock Incentive Plan | Employee Stock Option | | | | | | | | | | | |
Share Based Compensation Arrangements and Share Repurchase Plan [Line Items] | | | | | | | | | | | |
Vesting period, years | | | | | | 4 years | | | | | |
Term from date of grant, years | | | | | | 10 years | | | | | |