Fair Value Measurements (Recurring) (Details) $ in Thousands	Mar. 31, 2019 USD ($) derivative	Dec. 31, 2018 USD ($)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Number of interest rate derivatives | derivative	0
Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative assets		$ 3,914
Derivative liability	$ (920)	(5,856)
Earnout derivative liability	(5,825)
Total net assets	(6,745)	(1,942)
Fair Value, Inputs, Level 2 | Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative assets		3,914
Derivative liability	(920)
Total net assets	(920)	3,914
Fair Value, Inputs, Level 3 | Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative liability		(5,856)
Earnout derivative liability	(5,825)
Total net assets	$ (5,825)	$ (5,856)