Regulatory Capital (Tables)

12 Months Ended

Dec. 31, 2015

Banking and Thrift [Abstract]

Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations

	Actual				"Well Capitalized" Regulatory Requirements
	Amount		Ratio		Amount			Ratio
As of December 31, 2015:
Common Equity Tier 1 Capital (to Risk-Weighted Assets)	$	1,734,315	14.4	%	$	781,638	>	6.5	%
Tier 1 Capital (to Risk-Weighted Assets)	$	1,734,315	14.4	%	$	962,017	>	8.0	%
Total Capital (to Risk-Weighted Assets)	$	1,848,528	15.4	%	$	1,202,521	>	10.0	%
Tier 1 Capital (to Average Assets)	$	1,734,315	12.3	%	$	704,979	>	5.0	%
As of December 31, 2014:
Tier 1 Capital (to Risk-Weighted Assets)	$	1,413,988	15.0	%	$	565,148	>	6.0	%
Total Capital (to Risk-Weighted Assets)	$	1,497,830	15.9	%	$	941,913	>	10.0	%
Tier 1 Capital (to Average Assets)	$	1,413,988	11.5	%	$	614,709	>	5.0	%