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Uniform Net Capital Rule Requirements - Net capital and aggregated indebtedness information for broker/dealer subsidiaries (Details)
$ in Thousands
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Waddell & Reed, Inc. (W&R)    
Net capital and aggregated indebtedness information for entity's broker/dealer subsidiaries    
Net capital $ 57,109 $ 28,024
Required capital 250 250
Excess of required capital 56,859 27,774
Ivy Funds Distributor, Inc. (IFDI)    
Net capital and aggregated indebtedness information for entity's broker/dealer subsidiaries    
Net capital 25,688 21,167
Required capital 1,336 1,757
Excess of required capital $ 24,352 $ 19,410
Ratio of aggregate indebtedness to net capital 0.78 1.25