Note 14 - Leases - Components of Lease Expense (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2019 USD ($)
Operating lease cost	$ 15,441
Amortization of right-of-use assets	985
Interest on lease liabilities	43
Total finance lease cost	1,028
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	15,235
Operating cash flow from finance leases	43
Financing cash flows from finance leases	1,251
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	72,079
Finance lease