Business Segments (Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Business segment information
Total assets for reportable segments	$ 1,369,305	$ 1,278,068
Unallocated cash and cash equivalents	296,428	245,956	$ 263,009	$ 225,143
Unallocated deferred tax assets	57,136	20,636
Operating segments
Business segment information
Total assets for reportable segments	771,277	762,783
Operating segments | UGG brand
Business segment information
Total assets for reportable segments	419,280	248,937
Operating segments | Teva brand wholesale
Business segment information
Total assets for reportable segments	58,835	87,225
Operating segments | Sanuk brand
Business segment information
Total assets for reportable segments	70,811	212,816
Operating segments | Other brands
Business segment information
Total assets for reportable segments	68,299	65,072
Operating segments | Direct-to-Consumer
Business segment information
Total assets for reportable segments	154,052	148,733
Segment Reconciling Items
Business segment information
Other unallocated corporate assets	$ 244,464	$ 248,693