Derivative Instruments And Hedging Activities (Details) $ in Millions	1 Months Ended	6 Months Ended
	Jul. 31, 2013 USD ($) contract	Jun. 30, 2015 USD ($)	Dec. 31, 2014 USD ($)
Line of Credit Facility [Line Items]
Number of interest rate swap contracts | contract	2
Notional amount of interest rate swap		$ 14.3
Swap option, termination date		Jun. 30, 2020
$25 Million Term Loan [Member]
Line of Credit Facility [Line Items]
Percentage of debt converted to fixed-rate debt	80.00%
Maximum borrowing capacity	$ 25.0	$ 25.0	$ 25.0
Fixed interest rate	3.73%
$25 Million Term Loan With 3.73% Fixed Interest Rate [Member]
Line of Credit Facility [Line Items]
Fixed interest rate		3.73%