Fair Value - Recorded Amount of Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract]
Derivative assets - interest rate swaps	$ 2,511	$ 2,143
Derivative liabilities - interest rate swaps	(945)	(1,300)
Level 2
Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract]
Derivative assets - interest rate swaps	2,511	2,143
Derivative liabilities - interest rate swaps	$ (945)	$ (1,300)