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Long-term Debt (Details) (USD $)
 1 Months Ended 9 Months Ended 1 Months Ended 3 Months Ended
Dec. 31, 2013
Mar. 31, 2013
Feb. 29, 2012
Credit facility
Dec. 31, 2013
Credit facility
tier
Q
Dec. 31, 2013
Credit facility
Minimum
Dec. 31, 2013
Credit facility
Maximum
Dec. 31, 2013
Credit facility
LIBOR
Dec. 31, 2013
Credit facility
LIBOR
Minimum
Dec. 31, 2013
Credit facility
LIBOR
Maximum
Dec. 31, 2013
Credit facility
CBFR using bank prime rate
Dec. 31, 2013
Credit facility
CBFR using bank prime rate
Minimum
Dec. 31, 2013
Credit facility
CBFR using bank prime rate
Maximum
Dec. 31, 2013
Credit facility
CBFR using one month LIBOR
Dec. 31, 2013
Credit facility
CBFR using one month LIBOR
Minimum
Dec. 31, 2013
Credit facility
CBFR using one month LIBOR
Maximum
Feb. 29, 2012
Letters of credit
Jan. 31, 2014
Revolving line of credit
Nov. 30, 2013
Revolving line of credit
Dec. 31, 2013
Revolving line of credit
Mar. 31, 2013
Revolving line of credit
Feb. 29, 2012
Revolving line of credit
Debt                                          
Long-term debt                                     $ 16,000,000 $ 4,000,000  
Long-term portion 16,000,000 4,000,000                                      
Effective rate of interest (as a percent) 1.40%                                        
Debt instrument, term     3 years                                    
Maximum borrowing capacity                               1,000,000         20,000,000
Description of variable rate basis             LIBOR     Prime rate     One month LIBOR                
Spread on variable rate (as a percent)               1.25% 2.00%   (0.50%) (1.25%) 2.50% (0.50%) (1.25%)            
Unused capacity fee (as a percent)         0.15% 0.30%                              
Number of trailing quarters of EBITDA used to calculate ratio of funded debt to EBITDA       4                                  
High end of ratio of funded debt to the entity's trailing four quarters of EBIDTA for unused capacity fees         2                                
Low end of ratio of funded debt to the entity's trailing four quarters of EBIDTA for unused capacity fees           1                              
Number of defined tiers of ratio of funded debt to EBITDA       4                                  
Ratio of funded debt to EBIDTA required to be maintained       2.5                                  
Fixed charge coverage ratio, required to be maintained         1.5                                
Borrowings for facilitating acquisition                                   18,000,000      
Principal repayments                                 1,000,000   2,000,000    
Outstanding borrowings                                     $ 16,000,000