Stockholders' Equity (Tables)

3 Months Ended

Mar. 31, 2018

Equity [Abstract]

Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations

The Company's and the Bank's actual capital amounts and ratios as of March 31, 2018 and December 31, 2017 are also presented in the following table.

	Actual				Minimum Capital Requirement				Minimum To Be Well Capitalized
	Amount		Ratio		Amount		Ratio		Amount		Ratio
	(Dollars in thousands)
Blue Hills Bancorp, Inc.:
March 31, 2018
Total capital (to risk weighted assets)	$	408,223	19.4	%	$	167,942	8.0	%	$	209,928	10.0	%
Tier 1 capital (to risk weighted assets)	388,039		18.5		125,957		6.0		167,942		8.0
Common equity Tier 1 (to risk weighted assets)	388,039		18.5		94,468		4.5		136,453		6.5
Tier 1 capital (to average assets)	388,039		14.7		105,730		4.0		132,162		5.0
December 31, 2017
Total capital (to risk weighted assets)	$	410,088	19.7	%	$	166,635	8.0	%	$	208,294	10.0	%
Tier 1 capital (to risk weighted assets)	389,211		18.7		124,977		6.0		166,635		8.0
Common equity Tier 1 (to risk weighted assets)	389,211		18.7		93,732		4.5		135,391		6.5
Tier 1 capital (to average assets)	389,211		14.9		104,278		4.0		130,348		5.0
Blue Hills Bank:
March 31, 2018
Total capital (to risk weighted assets)	$	349,045	16.6	%	$	167,751	8.0	%	$	209,689	10.0	%
Tier 1 capital (to risk weighted assets)	328,860		15.7		125,813		6.0		167,751		8.0
Common equity Tier 1 (to risk weighted assets)	328,860		15.7		94,360		4.5		136,298		6.5
Tier 1 capital (to average assets)	328,860		12.5		105,603		4.0		132,004		5.0
December 31, 2017
Total capital (to risk weighted assets)	$	341,175	16.4	%	$	166,391	8.0	%	$	207,988	10.0	%
Tier 1 capital (to risk weighted assets)	320,298		15.4		124,793		6.0		166,391		8.0
Common equity Tier 1 (to risk weighted assets)	320,298		15.4		93,595		4.5		135,192		6.5
Tier 1 capital (to average assets)	320,298		12.3		104,137		4.0		130,171		5.0