Derivative Financial Instruments (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2016	Dec. 31, 2015	Nov. 15, 2013
Credit Derivatives [Line Items]
Interest rate swap liability	$ 2,478	$ 2,042
Gain recognized in other comprehensive income	$ 1,400	$ 1,154
November 2013 Agreement [Member]
Credit Derivatives [Line Items]
Notional amount of interest rate swap			$ 160,000
Fixed rate of derivative			5.384%
Derivative, basis spread on variable rate			3.50%