Capital Requirements - General Information (Details)	3 Months Ended
	Mar. 31, 2016
Capital Requirements
Capital conservation buffer (as a percent)	0.625%
Phase-in period (in years)	4 years
Capital conservation buffer, end rate after annual increases (as a percent)	2.50%
HBC (Wholly-owned Subsidiary)
Capital Requirements
Capital conservation buffer (as a percent)	0.625%
Phase-in period (in years)	4 years
Capital conservation buffer, end rate after annual increases (as a percent)	2.50%