Business Segments, Concentration of Business, and Credit Risk and Significant Customers (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 30, 2014 store	Sep. 30, 2013	Sep. 30, 2014 store	Sep. 30, 2013	Mar. 31, 2014
Business segment information
Number of Stores	7		7
Net sales to external customers	$ 480,273	$ 386,725	$ 691,742	$ 556,810
Income (loss) from operations:	59,583	46,497	9,101	3,746
Total assets for reportable segments	1,402,003		1,402,003		1,064,204
Reportable segments
Business segment information
Total assets for reportable segments	1,073,471		1,073,471		654,679
UGG wholesale
Business segment information
Net sales to external customers	339,799	273,677	413,992	336,043
Income (loss) from operations:	123,670	82,256	126,363	81,746
Total assets for reportable segments	617,013		617,013		153,341
Teva wholesale
Business segment information
Net sales to external customers	17,603	15,893	53,268	44,641
Income (loss) from operations:	(310)	(1,366)	4,472	783
Total assets for reportable segments	41,445		41,445		81,766
Sanuk wholesale
Business segment information
Net sales to external customers	15,955	16,649	48,284	44,435
Income (loss) from operations:	2,684	3,657	9,589	10,146
Total assets for reportable segments	202,451		202,451		214,627
Other wholesale
Business segment information
Net sales to external customers	22,117	12,993	33,942	20,971
Income (loss) from operations:	(571)	(189)	(4,582)	(2,678)
Total assets for reportable segments	48,974		48,974		41,281
eCommerce
Business segment information
Net sales to external customers	21,604	14,884	37,031	25,620
Income (loss) from operations:	7,441	2,678	8,250	4,347
Total assets for reportable segments	5,530		5,530		3,129
Retail stores
Business segment information
Net sales to external customers	63,195	52,629	105,225	85,100
Income (loss) from operations:	(7,114)	(2,260)	(22,965)	(12,078)
Total assets for reportable segments	158,058		158,058		160,535
Unallocated to Segments
Business segment information
Income (loss) from operations:	$ (66,217)	$ (38,279)	$ (112,026)	$ (78,520)