Fair Value Measurements - Assets and Liabilities Measured at Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Level 1 | Recurring basis
Fair value measurement of assets and liabilities
Interest rate swaps asset	$ 0	$ 0
Interest rate swaps liability	0	0
Level 1 | Nonrecurring basis
Fair value measurement of assets and liabilities
Impaired long-lived assets	0	0
Level 2 | Recurring basis
Fair value measurement of assets and liabilities
Interest rate swaps asset	538	413
Interest rate swaps liability	(2,008)	(3,603)
Level 2 | Nonrecurring basis
Fair value measurement of assets and liabilities
Impaired long-lived assets	0	0
Level 3 | Recurring basis
Fair value measurement of assets and liabilities
Interest rate swaps asset	0	0
Interest rate swaps liability	0	0
Level 3 | Nonrecurring basis
Fair value measurement of assets and liabilities
Impaired long-lived assets	$ 405	$ 6,460