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Stockholders' Equity - Restricted Stock Units (Details)
 1 Months Ended 3 Months Ended 12 Months Ended
Mar. 31, 2018
USD ($)
item
$ / shares
shares
Mar. 31, 2017
USD ($)
item
$ / shares
shares
Apr. 02, 2016
Mar. 31, 2016
USD ($)
item
$ / shares
shares
Feb. 02, 2019
USD ($)
Nov. 03, 2018
USD ($)
Aug. 04, 2018
USD ($)
May 05, 2018
USD ($)
Feb. 03, 2018
USD ($)
Oct. 28, 2017
USD ($)
Jul. 29, 2017
USD ($)
Apr. 29, 2017
USD ($)
Feb. 02, 2019
USD ($)
item
shares
Feb. 03, 2018
USD ($)
item
Jan. 28, 2017
USD ($)
Stockholders' Equity                              
Income tax benefit         $ 1,802,000 $ (237,000) $ 788,000 $ 2,601,000 $ 4,688,000 $ 286,000 $ (87,000) $ 4,039,000 $ 4,954,000 $ 8,926,000 $ 6,020,000
Restricted Stock                              
Stockholders' Equity                              
Compensation expense                         2,200,000 1,600,000 $ 2,900,000
Income tax benefit                         $ 140,000 $ 70,000  
Granted (in shares) | shares                         80,045    
Restricted Stock | Employee                              
Stockholders' Equity                              
Vesting period                         3 years    
Restricted Stock | Director                              
Stockholders' Equity                              
Vesting period                         1 year    
March 2016 RSU                              
Stockholders' Equity                              
Expiration period       3 years                      
Compensation expense       $ 238,000                      
Number of employees to whom awards are granted | item       2                      
Percentage of vesting upon achieving specific performance     25.00%                        
Number of consecutive period for which closing stock price should be achieved to vest shares       20 days                      
First target price for vesting of shares (in dollars per share) | $ / shares $ 30.44     $ 20.75                      
Second target price for vesting of shares (in dollars per share) | $ / shares 35.01     23.50                      
Third target price for vesting of shares (in dollars per share) | $ / shares $ 40.26     26.25                      
Fourth target price for vesting of shares (in dollars per share) | $ / shares       $ 29.00                      
Number of thresholds achieved | item                         2 2  
Granted (in shares) | shares       24,816                      
March 2017 RSU                              
Stockholders' Equity                              
Expiration period   3 years                          
Compensation expense   $ 306,000                          
Number of employees to whom awards are granted | item   2                          
Percentage of vesting upon achieving specific performance   25.00%                          
Number of consecutive period for which closing stock price should be achieved to vest shares   20 days                          
First target price for vesting of shares (in dollars per share) | $ / shares   $ 19.10                          
Second target price for vesting of shares (in dollars per share) | $ / shares   21.70                          
Third target price for vesting of shares (in dollars per share) | $ / shares   24.30                          
Fourth target price for vesting of shares (in dollars per share) | $ / shares   $ 26.90                          
Number of employees to whom awards are granted who subsequently resigned | item   1                          
Number of thresholds achieved | item                           3  
Granted (in shares) | shares   23,551                          
March 2018 RSU                              
Stockholders' Equity                              
Expiration period 3 years                            
Compensation expense $ 137,000                            
Percentage of vesting upon achieving specific performance 33.00%                            
Number of consecutive period for which closing stock price should be achieved to vest shares 20 days                            
Number of employees to whom awards are granted who subsequently resigned | item 1                            
Number of thresholds achieved | item                         1    
Granted (in shares) | shares 8,400                            
March 2018 EBITDA RSU                              
Stockholders' Equity                              
Expiration period 3 years                            
Compensation expense $ 78,000                            
Number of employees to whom awards are granted | item 1                            
Percentage of vesting upon achieving specific performance 33.00%                            
Trailing month EBITDA should be achieved to vest shares under the share based compensation plan 12 months                            
First adjusted EBITDA level for vesting of shares under the share based compensation plan $ 51,400,000                            
Second adjusted EBITDA level for vesting of shares under the share based compensation plan 59,100,000                            
Third adjusted EBITDA level for vesting of shares under the share based compensation plan $ 67,900,000                            
Number of thresholds achieved                         0    
Granted (in shares) | shares 8,401