Regulatory Matters - Net Capital Position, Broker-Dealers (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Net Capital
Amount required to be segregated in cash and securities for the benefit of customers	$ 166,395	$ 180,993
Hilltop Securities
Net Capital
Net capital	158,331
Less required net capital	9,267
Excess net capital	$ 149,064
Net capital as a percentage of aggregate debit items	34.20%
Net capital in excess of 5% aggregate debt items	$ 135,164
Amount required to be segregated in cash and securities for the benefit of customers	166,400	$ 181,000
HTS Independent Network
Net Capital
Net capital	3,080
Less required net capital	250
Excess net capital	$ 2,830