Reportable Operating Segments - Reconciliation (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019
Reconciliations of total assets from reportable segments to the condensed consolidated balance sheets
Unallocated cash and cash equivalents	$ 649,436	$ 589,692
Unallocated deferred tax assets, net	28,233	30,870
Total assets	1,765,118	1,427,206
Reportable segments
Reconciliations of total assets from reportable segments to the condensed consolidated balance sheets
Total assets	775,840	592,342
Segment reconciling items
Reconciliations of total assets from reportable segments to the condensed consolidated balance sheets
Unallocated other corporate assets	311,609	214,302
UGG brand wholesale | Reportable segments
Reconciliations of total assets from reportable segments to the condensed consolidated balance sheets
Total assets	245,239	240,411
HOKA brand wholesale | Reportable segments
Reconciliations of total assets from reportable segments to the condensed consolidated balance sheets
Total assets	124,958	94,157
Teva brand wholesale | Reportable segments
Reconciliations of total assets from reportable segments to the condensed consolidated balance sheets
Total assets	90,305	76,370
Sanuk brand wholesale | Reportable segments
Reconciliations of total assets from reportable segments to the condensed consolidated balance sheets
Total assets	50,314	71,285
Other brands wholesale | Reportable segments
Reconciliations of total assets from reportable segments to the condensed consolidated balance sheets
Total assets	21,535	14,618
Direct-to-Consumer | Reportable segments
Reconciliations of total assets from reportable segments to the condensed consolidated balance sheets
Total assets	$ 243,489	$ 95,501