Stockholders' Equity (Details) (USD $)	0 Months Ended	12 Months Ended
	Feb. 04, 2011	Dec. 31, 2012	Dec. 31, 2011
Equity, Class of Treasury Stock [Line Items]
Maximum number of common shares authorized to be repurchased (in shares)			100,000
Total number of shares authorized and available for repurchase (in shares)			540,000
Number of shares repurchased (in shares)		50,454
Repurchased common stock, value		$ 405,000	$ 315,000
Stock issued during period (in shares)	350,000
Stock issued price per share (in dollars per share)	$ 20
Additional shares sold through exercise by underwriter of over-allotment option (in shares)		0	0
Net proceeds from public offering		0	6,562,000
Net Proceeds from Issuance of Common Stock	$ 6,404,000
Common stock [Member]
Equity, Class of Treasury Stock [Line Items]
Additional shares sold through exercise by underwriter of over-allotment option (in shares)	45,652