Leased Property (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Leased Property
Right of use assets - operating	$ 76,647	$ 76,747
Right of use assets - finance	35,950	39,905
Capitalized costs of lessor assets	45,594	41,040
Less: accumulated depreciation	(16,302)	(10,941)
Leased property, net	$ 141,889	$ 146,751