Cash and Cash Equivalents and Fair Value of Financial Instruments - Fair Value Hierarchy of Financial Assets Measured at Fair Value (Details) $ in Thousands	Dec. 31, 2018 USD ($)
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swap contracts	$ 0
Total financial assets	0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swap contracts	562
Total financial assets	562
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swap contracts	0
Total financial assets	0
Interest Rate Swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swap contracts	562
Total financial assets	$ 562