Real Estate Finance Lease Liability, Maturity - Platform 16 (Details) - USD ($) $ in Thousands		Jun. 30, 2019	Jan. 24, 2019	Dec. 31, 2018
Real estate
2019		$ 2,494
2020	[1]	121,499
Total expected minimum lease payments		202,001
Interest portion		(29,099)
Present value of expected net lease payments		$ 172,902		$ 0
Platform 16 [Member]
Real estate
2019			$ 17,918
2020			109,460
Total expected minimum lease payments			127,378
Interest portion			(4,815)
Present value of expected net lease payments			$ 122,563

[1] Finance lease payments in 2020 and 2024 include approximately $119.8 million and $38.7 million, respectively, related to purchase options that the Company is reasonably certain that it will exercise.