Deposits (Details Textual) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Time Deposits Balance [Domain]
Domestic Deposits, Brokered [Line Items]
Interest-bearing Domestic Deposit, Brokered	$ 272.5	$ 636.7
Non-maturity Deposits [Member]
Domestic Deposits, Brokered [Line Items]
Interest-bearing Domestic Deposit, Brokered	$ 942.3	$ 120.6

Amount of interest-bearing domestic third-party deposits placed by or through the assistance of a deposit broker, also known as brokered deposit liabilities.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.12)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Name:	us-gaap_InterestBearingDomesticDepositBrokered
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant