Short Term Borrowings (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Lines Of Credit Facility
Established Lines at Year-End	$ 60,000	$ 60,000
Maximum Amount Outstanding	30,500	29,000
Weighted average daily amounts of borrowings outstanding	27,700	25,500
Notes Payable	$ 28,500	$ 28,000
Weighted average interest rates on line of credit facility (As a percentage)	1.41%	1.43%
Weighted Average Interest Rate at Year-End	1.47%	1.40%