Note 4 - Leases - Lessee Future Minimum Lease Payments (Details) $ in Thousands	Mar. 31, 2019 USD ($)
2019 (excluding the three months ended March 31, 2019), operating leases	$ 7,513
2019 (excluding the three months ended March 31, 2019), finance leases	3,400
2020, operating leases	4,109
2020, finance leases	3,715
2021, operating leases	3,400
2021, finance leases	2,720
2022, operating leases	2,419
2022, finance leases	2,421
2023, operating leases	1,590
2023, finance leases	1,834
Thereafter, operating leases	12,061
Thereafter, finance leases	2,692
Total future minimum lease payments, operating leases	31,092
Total future minimum lease payments, finance leases	16,782
Less imputed interest, operating leases	5,893
Less imputed interest, finance leases	1,681
Total, operating leases	25,199
Total, finance leases	$ 15,101