Reserve for loans impairments recorded after acquisition as a result of current information and events which result in it being probable that estimated cash flows will be less than previously expected or because actual cash flows are less than cash flows previously expected. This relates to loans not accounted for as debt securities, with evidence of deterioration of credit quality since origination that was acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 30

-Section 15

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=27045933&loc=d3e13503-111538

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (b)(2)

-URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544

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

Accounting for Certain Loans Acquired in a Purchase - Narrative (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014 SCB Bank	Dec. 31, 2013 SCB Bank	Feb. 10, 2012 SCB Bank	Sep. 30, 2014 Merger with CFS Bancorp, Inc. (Citizens)	Nov. 12, 2013 Merger with CFS Bancorp, Inc. (Citizens)
Business Acquisition [Line Items]
Loan Acquired during acquisition					$ 113,000,000		$ 639,600,000
Fair Value Discount					19,200,000		36,500,000
Allowance	$ 459,000	$ 229,000	$ 61,000	$ 229,000		$ 398,000