Income Taxes - Provision of Income Taxes (Details) (USD $)	12 Months Ended
	Feb. 28, 2014	Feb. 28, 2013	Feb. 29, 2012
Income (loss) before income taxes:
Domestic	$ 83,495,000	$ 92,334,000	$ 65,054,000
Foreign	10,416,000	2,035,000	(1,413,000)
Income before income taxes	93,911,254	94,368,833	63,640,905
Current provision:
Federal	28,901,000	26,330,000	16,717,000
Foreign	1,903,000	(2,600,000)	159,000
State and Local	4,381,000	4,137,000	3,595,000
Total current provision for income taxes	35,186,000	27,866,000	20,470,000
Deferred provision (benefit):
Federal	(2,143,000)	2,024,000	3,646,000
Foreign	1,230,000	3,455,000	(1,330,000)
State and Local	41,000	568,000	119,000
Deferred Income Tax Expense (Benefit) Excluding Foreign Currency Transactions	(871,000)	6,047,000	2,435,000
Total provision for income taxes	$ 34,314,000	$ 33,913,000	$ 22,905,000