Shareholders' Equity, Dividends Restrictions and Other Regulatory Matters (Tables)

12 Months Ended

Dec. 31, 2015

Regulatory Capital Requirements [Abstract]

Schedule of Compliance with Regulatory Capital Requirements

Following is an analysis of capital ratios for BancShares and FCB as of December 31, 2015 and 2014:

	December 31, 2015						December 31, 2014
(Dollars in thousands)	Amount (1)		Ratio (1)		Requirements to be well-capitalized (2)		Amount		Ratio		Requirements to be well-capitalized
BancShares
Tier 1 risk-based capital	$	2,831,242	12.65	%	8.00	%	$	2,690,324	13.61	%	6.00	%
Common equity Tier 1 (3)	2,799,163		12.51		6.50		N/A		N/A		N/A
Total risk-based capital	3,140,212		14.03		10.00		2,904,123		14.69		10.00
Leverage capital	2,831,242		8.96		5.00		2,690,324		8.91		5.00
FCB
Tier 1 risk-based capital	2,821,475		12.64		8.00		2,019,595		13.12		6.00
Common equity Tier 1 (3)	2,821,475		12.64		6.50		N/A		N/A		N/A
Total risk-based capital	3,038,070		13.61		10.00		2,212,163		14.37		10.00
Leverage capital	2,821,475		8.95		5.00		2,019,595		9.30		5.00
FCB-SC (4)
Tier 1 risk-based capital	N/A		N/A		N/A		653,515		15.11		6.00
Total risk-based capital	N/A		N/A		N/A		657,475		15.20		10.00
Leverage capital	N/A		N/A		N/A		653,515		7.89		5.00