Derivative Financial Instruments (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Nov. 15, 2013
Derivative Instrument [Line Items]
Interest rate swap liability	$ 2,042,000	$ 1,294,000
Offset to accumulated other comprehensive income	$ 1,154,000	$ 1,215,000
November 2013 Agreement [Member]
Derivative Instrument [Line Items]
Notional amount of interest rate swap			$ 160,000,000
Long-term debt, gross			$ 325,000,000
Derivative, fixed interest rate (as a percent)			5.384%
Derivative, basis spread on variable rate (as a percent)			3.50%