Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets:
Compensation	$ 9,817	$ 5,899
Accrued expenses	3,864	3,932
Foreign tax credits	7,439	8,758
Tax attribute carryforwards	2,101	2,321
Derivatives	5,141	1,478
Foreign currency	6,230	8,965
Deferred revenue	2,402	2,521
Deferred tax assets	36,994	33,874
Valuation allowance	(6,606)	(6,410)
Net deferred tax assets	30,388	27,464
Deferred tax liabilities:
Property	(95,087)	(94,847)
Intangibles	(17,347)	(14,334)
Deferred tax liabilities	(112,434)	(109,181)
Net deferred tax liability	$ (82,046)	$ (81,717)