Retirement and Postretirement Benefit Plans (Details 7) (USD $) In Thousands, unless otherwise specified	Feb. 29, 2012	Feb. 28, 2011	Feb. 28, 2010
U.S. Pension Plans [Member] | Short-term investments [Member]
Summary of the fair value of the defined benefit pension plan assets
Fair value of defined benefit pension plan assets	$ 710	$ 689
U.S. Pension Plans [Member] | Short-term investments [Member] | Quoted prices in active markets for identical assets (Level 1) [Member]
Summary of the fair value of the defined benefit pension plan assets
Fair value of defined benefit pension plan assets
U.S. Pension Plans [Member] | Short-term investments [Member] | Significant other observable inputs (Level 2) [Member]
Summary of the fair value of the defined benefit pension plan assets
Fair value of defined benefit pension plan assets	710	689
U.S. Pension Plans [Member] | Equity securities [Member]
Summary of the fair value of the defined benefit pension plan assets
Fair value of defined benefit pension plan assets	41,322	42,776
U.S. Pension Plans [Member] | Equity securities [Member] | Quoted prices in active markets for identical assets (Level 1) [Member]
Summary of the fair value of the defined benefit pension plan assets
Fair value of defined benefit pension plan assets
U.S. Pension Plans [Member] | Equity securities [Member] | Significant other observable inputs (Level 2) [Member]
Summary of the fair value of the defined benefit pension plan assets
Fair value of defined benefit pension plan assets	41,322	42,776
U.S. Pension Plans [Member] | Fixed-income funds [Member]
Summary of the fair value of the defined benefit pension plan assets
Fair value of defined benefit pension plan assets	39,510	40,717
U.S. Pension Plans [Member] | Fixed-income funds [Member] | Quoted prices in active markets for identical assets (Level 1) [Member]
Summary of the fair value of the defined benefit pension plan assets
Fair value of defined benefit pension plan assets
U.S. Pension Plans [Member] | Fixed-income funds [Member] | Significant other observable inputs (Level 2) [Member]
Summary of the fair value of the defined benefit pension plan assets
Fair value of defined benefit pension plan assets	39,510	40,717
International Pension Plans [Member] | Short-term investments [Member]
Summary of the fair value of the defined benefit pension plan assets
Fair value of defined benefit pension plan assets	1,163	639
International Pension Plans [Member] | Short-term investments [Member] | Quoted prices in active markets for identical assets (Level 1) [Member]
Summary of the fair value of the defined benefit pension plan assets
Fair value of defined benefit pension plan assets
International Pension Plans [Member] | Short-term investments [Member] | Significant other observable inputs (Level 2) [Member]
Summary of the fair value of the defined benefit pension plan assets
Fair value of defined benefit pension plan assets	1,163	639
International Pension Plans [Member] | Equity securities [Member]
Summary of the fair value of the defined benefit pension plan assets
Fair value of defined benefit pension plan assets	7,753	7,191
International Pension Plans [Member] | Equity securities [Member] | Quoted prices in active markets for identical assets (Level 1) [Member]
Summary of the fair value of the defined benefit pension plan assets
Fair value of defined benefit pension plan assets
International Pension Plans [Member] | Equity securities [Member] | Significant other observable inputs (Level 2) [Member]
Summary of the fair value of the defined benefit pension plan assets
Fair value of defined benefit pension plan assets	7,753	7,191
International Pension Plans [Member] | Fixed-income funds [Member]
Summary of the fair value of the defined benefit pension plan assets
Fair value of defined benefit pension plan assets	15,883	15,869
International Pension Plans [Member] | Fixed-income funds [Member] | Quoted prices in active markets for identical assets (Level 1) [Member]
Summary of the fair value of the defined benefit pension plan assets
Fair value of defined benefit pension plan assets
International Pension Plans [Member] | Fixed-income funds [Member] | Significant other observable inputs (Level 2) [Member]
Summary of the fair value of the defined benefit pension plan assets
Fair value of defined benefit pension plan assets	15,883	15,869
Pension Plans [Member]
Summary of the fair value of the defined benefit pension plan assets
Fair value of defined benefit pension plan assets	106,341	107,881	102,092
Pension Plans [Member] | Quoted prices in active markets for identical assets (Level 1) [Member]
Summary of the fair value of the defined benefit pension plan assets
Fair value of defined benefit pension plan assets
Pension Plans [Member] | Significant other observable inputs (Level 2) [Member]
Summary of the fair value of the defined benefit pension plan assets
Fair value of defined benefit pension plan assets	106,341	107,881
Postretirement benefit plan [Member]
Summary of the fair value of the defined benefit pension plan assets
Fair value of defined benefit pension plan assets	57,563	66,935	66,928
Postretirement benefit plan [Member] | Quoted prices in active markets for identical assets (Level 1) [Member]
Summary of the fair value of the defined benefit pension plan assets
Fair value of defined benefit pension plan assets	17,245	29,229
Postretirement benefit plan [Member] | Significant other observable inputs (Level 2) [Member]
Summary of the fair value of the defined benefit pension plan assets
Fair value of defined benefit pension plan assets	40,318	37,706
Postretirement benefit plan [Member] | Short-term investments [Member]
Summary of the fair value of the defined benefit pension plan assets
Fair value of defined benefit pension plan assets	849	1,176
Postretirement benefit plan [Member] | Short-term investments [Member] | Quoted prices in active markets for identical assets (Level 1) [Member]
Summary of the fair value of the defined benefit pension plan assets
Fair value of defined benefit pension plan assets
Postretirement benefit plan [Member] | Short-term investments [Member] | Significant other observable inputs (Level 2) [Member]
Summary of the fair value of the defined benefit pension plan assets
Fair value of defined benefit pension plan assets	849	1,176
Postretirement benefit plan [Member] | Equity securities [Member]
Summary of the fair value of the defined benefit pension plan assets
Fair value of defined benefit pension plan assets	17,245	29,229
Postretirement benefit plan [Member] | Equity securities [Member] | Quoted prices in active markets for identical assets (Level 1) [Member]
Summary of the fair value of the defined benefit pension plan assets
Fair value of defined benefit pension plan assets	17,245	29,229
Postretirement benefit plan [Member] | Equity securities [Member] | Significant other observable inputs (Level 2) [Member]
Summary of the fair value of the defined benefit pension plan assets
Fair value of defined benefit pension plan assets
Postretirement benefit plan [Member] | Fixed-income funds [Member]
Summary of the fair value of the defined benefit pension plan assets
Fair value of defined benefit pension plan assets	39,469	36,530
Postretirement benefit plan [Member] | Fixed-income funds [Member] | Quoted prices in active markets for identical assets (Level 1) [Member]
Summary of the fair value of the defined benefit pension plan assets
Fair value of defined benefit pension plan assets
Postretirement benefit plan [Member] | Fixed-income funds [Member] | Significant other observable inputs (Level 2) [Member]
Summary of the fair value of the defined benefit pension plan assets
Fair value of defined benefit pension plan assets	$ 39,469	$ 36,530