Regulatory Capital (Tables)

12 Months Ended

Dec. 31, 2017

Banking and Thrift [Abstract]

Schedule of compliance with regulatory capital requirements

The following capital amounts and ratios are based upon the Bank’s assets.

	Actual				“Well Capitalized” Regulatory Requirements
	Amount		Ratio		Amount			Ratio
As of December 31, 2017:
Common Equity Tier 1 Capital (to Risk-Weighted Assets)	$	2,350,081	11.9	%	$	1,288,435	>	6.5	%
Tier 1 Capital (to Risk-Weighted Assets)	$	2,350,081	11.9	%	$	1,585,767	>	8.0	%
Total Capital (to Risk-Weighted Assets)	$	2,597,926	13.1	%	$	1,982,208	>	10.0	%
Tier 1 Capital (to Average Assets)	$	2,350,081	11.0	%	$	1,067,739	>	5.0	%
As of December 31, 2016:
Common Equity Tier 1 Capital (to Risk-Weighted Assets)	$	2,011,583	12.6	%	$	1,038,638	>	6.5	%
Tier 1 Capital (to Risk-Weighted Assets)	$	2,011,583	12.6	%	$	1,278,323	>	8.0	%
Total Capital (to Risk-Weighted Assets)	$	2,197,997	13.8	%	$	1,597,904	>	10.0	%
Tier 1 Capital (to Average Assets)	$	2,011,583	11.1	%	$	907,565	>	5.0	%