Investment Securities (Textual) (Details) - USD ($) $ in Millions	Dec. 31, 2015	May. 31, 2015	Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract]
Trust preferred investment securities held to maturity	$ 10.5
Trust preferred investment security of non public bank company		$ 10.0
Securities pledged as collateral	$ 516.0		$ 493.0

The fair value of available-for-sale securities that serve as collateral for borrowings.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5086-111524

Name:	us-gaap_AvailableForSaleSecuritiesPledgedAsCollateral
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant