Goodwill and Other Intangible Assets - Carrying Amount and Accumulated Amortization of Intangible Assets (Detail) - USD ($)
$ in Thousands |
3 Months Ended |
12 Months Ended |
May 31, 2016 |
Feb. 29, 2016 |
| Finite-Lived Intangible Assets [Line Items] |
|
|
| Weighted Average Remaining Life (in years) |
9 years 2 months 12 days
|
8 years 8 months 12 days
|
| Gross Carrying Amount |
$ 55,861
|
$ 55,611
|
| Accumulated Amortization |
19,797
|
18,638
|
| Amortized intangible assets, Net |
$ 36,064
|
$ 36,973
|
| Trade Names [Member] |
|
|
| Finite-Lived Intangible Assets [Line Items] |
|
|
| Weighted Average Remaining Life (in years) |
0 years
|
0 years
|
| Gross Carrying Amount |
$ 1,234
|
$ 1,234
|
| Accumulated Amortization |
$ 1,234
|
$ 1,234
|
| Customer Lists [Member] |
|
|
| Finite-Lived Intangible Assets [Line Items] |
|
|
| Weighted Average Remaining Life (in years) |
9 years 2 months 12 days
|
8 years 8 months 12 days
|
| Gross Carrying Amount |
$ 53,669
|
$ 53,519
|
| Accumulated Amortization |
17,965
|
16,852
|
| Amortized intangible assets, Net |
$ 35,704
|
$ 36,667
|
| Noncompete [Member] |
|
|
| Finite-Lived Intangible Assets [Line Items] |
|
|
| Weighted Average Remaining Life (in years) |
1 year 7 months 6 days
|
1 year 9 months 18 days
|
| Gross Carrying Amount |
$ 175
|
$ 75
|
| Accumulated Amortization |
42
|
29
|
| Amortized intangible assets, Net |
$ 133
|
$ 46
|
| Patent [Member] |
|
|
| Finite-Lived Intangible Assets [Line Items] |
|
|
| Weighted Average Remaining Life (in years) |
1 year 9 months 18 days
|
2 years
|
| Gross Carrying Amount |
$ 783
|
$ 783
|
| Accumulated Amortization |
556
|
523
|
| Amortized intangible assets, Net |
$ 227
|
$ 260
|