Conversion and Stock Issuance (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Conversion and Stock Issuance [Abstract]
Shares sold or issued (in shares)	1,417,500
Stock issued, ESOP (in shares)	113,400
Share price (in dollars per share)	$ 10.00
Offering costs	$ 1.5
Proceeds from stock offering, net of offering costs	12.7
Proceeds to Fund the ESOP	1.1
Cash dividends paid	$ 7.5
Stock Conversion Ratio	0.87423
Common stock, outstanding (in shares)	2,587,544	2,587,544