Accounting For Certain Loans Acquired In a Purchase - Contractually Required Payments (Details) (USD $) In Thousands, unless otherwise specified	Feb. 10, 2012	Dec. 31, 2013 Merger with CFS Bancorp, Inc. (Citizens)	Dec. 31, 2012 SCB Bank
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Contractually required payments receivable at acquisition date	$ 31,143	$ 109,839	$ 31,143
Nonaccretable difference	9,688	22,679	9,688
Expected cash flows at acquisition date		87,160	21,455
Accretable difference	4,152	3,502	4,152
Basis in loans at acquisition date	$ 17,303	$ 83,658	$ 17,303