Borrowings (Additional Information) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Short-term Debt [Line Items]
Line of credit, maximum borrowing capacity	$ 9,900	$ 9,900
Line of credit, amount outstanding	0	0
Line of credit, expiration date	Dec. 20, 2014
PNC [Member]
Short-term Debt [Line Items]
Line of credit, maximum borrowing capacity	$ 10,000