Annual report pursuant to Section 13 and 15(d)

Debt - Additional Information (Detail)

v2.4.0.8
Debt - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended 0 Months Ended 12 Months Ended 0 Months Ended 12 Months Ended 0 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Mar. 31, 2014
Revolving credit facility [Member]
Contract
Mar. 31, 2013
Revolving credit facility [Member]
Dec. 03, 2010
Revolving credit facility [Member]
Mar. 24, 2014
Revolving credit facility [Member]
Letter of Credit [Member]
Mar. 31, 2014
Revolving credit facility [Member]
Letter of Credit [Member]
Mar. 31, 2014
Revolving credit facility [Member]
Maximum [Member]
Mar. 24, 2014
Revolving credit facility [Member]
Maximum [Member]
Letter of Credit [Member]
Mar. 31, 2014
Revolving credit facility [Member]
Minimum [Member]
Mar. 24, 2014
Revolving credit facility [Member]
Minimum [Member]
Letter of Credit [Member]
Debt Instrument [Line Items]                      
Short-term borrowings outstanding $ 0 $ 0                  
Line of credit         25,000 5,000          
Maximum limit of credit facility         50,000            
Term period of agreement     3 years                
Number of automatic one year extensions in term period     2                
Term period of agreement, automatic extension     1 year                
Unused commitment fee for borrowing               0.375%   0.20%  
Bank's prime rate     3.25% 3.25%              
Interest rate description     Interest at either (i) a rate equal to the bank's prime rate; or (ii) a rate equal to LIBOR plus a margin.                
LIBOR Plus a margin range               2.00%   1.00%  
Fee for outstanding letters of credit               1.25% 1.25% 0.75% 0.75%
Fix rate to reduce fee on outstanding     0.55%                
Availability under the line of credit     9,527       5,000        
Maximum funded debt to EBITDA ratio     3.5     3.5          
Minimum earnings to interest ratio     4.0     4.0          
Maximum funded debt to EBITDA ratio under condition one     2.0                
Dividend pay amount     25.00%                
Minimum funded debt to EBITDA ratio under condition two     2.0                
Assets book value     104,451                
Annual facility fees           0.375%          
Long-term debt payment requirements over the next five years $ 0