Debt (Schedule of Interest Rate Derivatives) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Interest Rate Swap, Date Entered, May 2012 [Member]
Derivative [Line Items]
Derivative, Inception Date	May 01, 2012
Derivative, Maturity Date	Apr. 01, 2019
Derivative, Fixed Interest Rate	2.84%
Debt Instrument, Description of Variable Rate Basis	1-month LIBOR
Derivative, Notional Amount	$ 40,000
Derivative Asset, Fair Value, Gross Asset	$ 31
Interest Rate Swap, Date Entered, June 2013 [Member]
Derivative [Line Items]
Derivative, Inception Date	Jun. 01, 2013
Derivative, Maturity Date	Jun. 01, 2020
Derivative, Fixed Interest Rate	3.41%
Debt Instrument, Description of Variable Rate Basis	1-month LIBOR
Derivative, Notional Amount	$ 80,000
Derivative Asset, Fair Value, Gross Asset	$ 230
Interest Rate Swap, Date Entered, March 2014 [Member]
Derivative [Line Items]
Derivative, Inception Date	Mar. 01, 2014
Derivative, Maturity Date	Jun. 01, 2020
Derivative, Fixed Interest Rate	3.46%
Debt Instrument, Description of Variable Rate Basis	1-month LIBOR
Derivative, Notional Amount	$ 130,000
Derivative Asset, Fair Value, Gross Asset	$ 298
Interest Rate Swap, Date Entered, March 2019 - 3.46% [Member]
Derivative [Line Items]
Derivative, Inception Date	Mar. 01, 2019
Derivative, Maturity Date	Dec. 01, 2021
Derivative, Fixed Interest Rate	3.46%
Debt Instrument, Description of Variable Rate Basis	1-month LIBOR
Derivative, Notional Amount	$ 100,000
Interest Rate Derivative Liabilities, at Fair Value	$ (92)
Interest Rate Swap, Date Entered, March 2019 - 3.47% [Member]
Derivative [Line Items]
Derivative, Inception Date	Mar. 01, 2019
Derivative, Maturity Date	Dec. 01, 2021
Derivative, Fixed Interest Rate	3.47%
Debt Instrument, Description of Variable Rate Basis	1-month LIBOR
Derivative, Notional Amount	$ 100,000
Interest Rate Derivative Liabilities, at Fair Value	(127)
Fair Value, Inputs, Level 2 [Member]
Derivative [Line Items]
Cash Flow Hedge Derivative Instrument Assets at Fair Value	$ 559	$ 1,297