(in 000s) | ||||||||||||
Year ended April 30, | 2013 | 2012 | 2011 | |||||||||
Balance, beginning of the year | $ | 14,972 | $ | 19,532 | $ | 29,252 | ||||||
Additions | 10,357 | 10,308 | 16,463 | |||||||||
Sales | (9,271 | ) | (11,976 | ) | (21,889 | ) | ||||||
Impairments | (2,090 | ) | (2,892 | ) | (4,294 | ) | ||||||
Balance, end of the year | $ | 13,968 | $ | 14,972 | $ | 19,532 | ||||||