Loans and Leases - Schedule of Activity In The Allowance For Loan Losses (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 38,000,000	$ 28,000,000	$ 22,000,000
Provision for loan losses	12,000,000	10,000,000	6,000,000
Charge-offs	(4,000,000)	0	0
Ending balance	46,000,000	38,000,000	28,000,000
Loans and leases, allowance for losses	46,000,000	38,000,000
Recoveries	0	0	$ 0
Commercial and Financial
Allowance for Loan and Lease Losses [Roll Forward]
Loans and leases, allowance for losses	11,000,000
Commercial and Financial | Senior Secured Bank Loans
Allowance for Loan and Lease Losses [Roll Forward]
Loans and leases, allowance for losses	$ 35,000,000	$ 26,000,000