Debt - Schedule of Aggregate Maturities of Total Indebtedness (Details) $ in Thousands	Jun. 30, 2018 USD ($)
Debt Disclosure [Abstract]
Year 1	$ 24,352
Year 2	205,499
Year 3	422,337
Year 4	7,171
Year 5	741,027
Thereafter	0
Aggregate principal amount of debt	1,400,386
Less unamortized discount and deferred financing costs	(14,704)
Total debt net of unamortized discount and deferred financing costs	$ 1,385,682