Regulatory Matters - Narrative (Details)	Dec. 31, 2015	Jan. 01, 2015
Banking and Thrift [Abstract]
Tier 1 capital (to risk-weighted assets), for capital adequacy purposes ratio	6.00%
Tier 1 capital (to risk-weighted assets), to be well capitalized under prompt corrective action provisions ratio	8.00%
Capital conservation buffer		2.50%
Maximum buffer, percent of risk weighted assets for 2016	0.625%
Maximum buffer, percent of risk weighted assets for 2017	1.25%
Maximum buffer, percent of risk weighted assets for 2018	1.875%
Maximum buffer, percent of risk weighted assets for 2019	2.50%