Borrowed Funds (Wholesale Borrowings and Long-term Debt) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Total	$ 1,085,821	$ 933,263
FHLB advances
Debt Instrument [Line Items]
Total	580,501	427,857
Subordinate debentures
Debt Instrument [Line Items]
Total	505,173	505,192
Wholesale Borrowings
Debt Instrument [Line Items]
Total	$ 147	$ 214

Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822

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