Note 6 - Leases (Tables)

9 Months Ended

Sep. 30, 2020

Notes Tables

Lease, Cost [Table Text Block]

	Quarter Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Operating lease cost	$	4,912	$	5,501	$	15,050	$	16,891
Short-term lease cost		5,422		8,125		16,288		20,846
Total lease cost	$	10,334	$	13,626	$	31,338	$	37,737

Lease, Supplemental Financial Statement Disclosures, Balance Sheet [Table Text Block]

	September 30, 2020(1)			December 31, 2019(2)
Operating leases:
Operating lease assets	$	67,504		$	71,466
Accrued expenses	$	16,490		$	15,828
Other liabilities		52,418			56,253
Total operating lease liabilities	$	68,908		$	72,081
Weighted-average remaining lease term (in years)		5.59			5.74
Weighted-average discount rate		4.86	%		5.71	%