Stockholders' Equity (Details) (USD $)	0 Months Ended	6 Months Ended
	Feb. 04, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011	Jun. 30, 2012 Common stock [Member]	Aug. 29, 2011 Common stock [Member]
Equity, Class of Treasury Stock [Line Items]
Maximum number of common shares authorized to be repurchased (in shares)		540,000
Increased number of common stock to be repurchase (in shares)						100,000
Treasury stock, shares		35,454		35,454	35,454
Repurchased common stock, value		$ 315,000		$ 315,000
Public offering [Abstract]
Common Stock, Shares, Issued	350,000
Sale of stock, per share amount	$ 20.00
Over allotment option shares issued	45,652
Proceeds from Issuance of Common Stock	$ 6,404,000	$ 0	$ 6,562,000