Subsequent Events (Additional Information) (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Subsequent Event [Line Items]
Assets	$ 2,010,612,000		$ 2,010,612,000		$ 2,006,300,000
Stockholders' Equity Attributable To Parent	181,861,000		181,861,000		185,026,000
Net Income (Loss) Attributable To Parent	6,532,000	5,967,000	12,341,000	11,569,000
Stock Issued Upon Completion Of Merger			503,000
Subsequent Event [Member]
Subsequent Event [Line Items]
Business Combination Purchase Consideration Price per Share			$ 1.75
Market Price Per Share			$ 22.90
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable			2,300,000
Other Payments to Acquire Businesses			716,000
Maximum Stock Exchange Ratio			0.6667
Minimum Stock Exchange Ratio			0.5456
Subsequent Event [Member] | United Commerce [Member]
Subsequent Event [Line Items]
Assets	127,700,000		127,700,000
Stockholders' Equity Attributable To Parent	14,000,000		14,000,000
Net Income (Loss) Attributable To Parent			$ 373,000
Percentage of Ownership held Prior to Merger	4.60%		4.60%