Derivative Financial Instruments (Details) (USD $)					9 Months Ended
	Sep. 30, 2014 contract	Dec. 31, 2013	Sep. 30, 2014 Long-term Debt [Member]	Dec. 31, 2013 Long-term Debt [Member]	Sep. 30, 2014 Effective July 18, 2016 [Member] Forward Contracts [Member]	Sep. 30, 2014 Effective April 18, 2016 [Member] Forward Contracts [Member]	Sep. 30, 2014 Effective October 18, 2016 [Member] Forward Contracts [Member]
Derivative [Line Items]
Derivative, Number of instruments held	3
Derivative, notional amount					$ 40,000,000	$ 30,000,000	$ 40,000,000
Cash flow hedges, notional amount	110,000,000	70,000,000	110,000,000	70,000,000	40,000,000	30,000,000	40,000,000
Derivative, swaption interest rate					2.98%	2.89%	2.841%
Derivative, term of contract					3 years	4 years 6 months	3 years
Cash flow hedges, derivative fair value, asset	0	803,000	0	803,000
Cash flow hedges, derivative fair value, liability	1,357,000	0	1,357,000	0
Cash flow hedges, net ineffective hedge gain/(losses)	$ 0	$ 0	$ 0	$ 0