CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014
Cash flows from operating activities
Net income	$ 114,333	$ 108,991	$ 76,402
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	25,392	20,374	13,676
Gain on repurchase of unsecured promissory notes		(1,893)
Change in contingent purchase price payable	(899)	(4,186)	(468)
Gain on the sale of joint venture interest		(1,908)
Equity based compensation	15,576	12,224	9,953
Tax benefit from exercise/vesting of equity awards	(10,127)	(7,039)	(2,915)
Deferred financing charges	845	895	751
Deferred income taxes	3,590	863	754
Other	353	275
Changes in operating assets and liabilities:
Accounts receivable, net	(23,616)	(37,568)	18,611
Inventories, net	(59,908)	(69,765)	(35,584)
Income taxes, net	(16,833)	289	(18,766)
Prepaid expenses and other current assets	725	(2,563)	(1,434)
Other assets, net	(97)	(1,494)	(14,972)
Accounts payable, accrued expenses and other liabilities	14,835	64,105	38,585
Net cash provided by operating activities	64,169	81,600	84,593
Cash flows from investing activities
Investment in unconsolidated affiliate	(25,490)
Acquisitions, net of cash acquired			(49,129)
Proceeds from sale of interest in joint venture, net		2,695
Proceeds from sale of a retail store		516
Capital expenditures	(42,172)	(42,566)	(29,283)
Net cash used in investing activities	(67,662)	(39,355)	(78,412)
Cash flows from financing activities
Proceeds from sale of common stock, net		128,686
Repayment of borrowings, net		(48,039)	(16,157)
Repurchase of unsecured promissory notes		(17,721)
Noncontrolling interest investment, net			2,399
Proceeds from exercise of equity awards	417	729	1,906
Taxes paid for net share settlement		(4,316)	(1,062)
Excess tax benefit from exercise/vesting of equity awards	10,127	7,039	2,915
Net cash provided by (used in) financing activities	10,544	66,378	(9,999)
Foreign currency translation adjustments	(2,818)	(2,360)	(1,451)
Net increase (decrease) in cash and cash equivalents	4,233	106,263	(5,269)
Cash and cash equivalents at beginning of year	128,354	22,091	27,360
Cash and cash equivalents at end of year	132,587	128,354	22,091
Cash paid during the year for:
Interest	5,544	7,048	8,500
Income taxes	$ 68,067	$ 51,630	$ 65,076