Note 6 - Leases (Tables)

6 Months Ended

Jun. 30, 2020

Notes Tables

Lease, Cost [Table Text Block]

	Quarter Ended June 30,				Six Months Ended June 30,
	2020		2019		2020		2019
Operating lease cost	$	4,932	$	5,938	$	10,138	$	11,390
Short-term lease cost		4,785		5,482		10,866		12,721
Total lease cost	$	9,717	$	11,420	$	21,004	$	24,111

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

	June 30, 2020(1)			December 31, 2019(2)
Operating leases:
Operating lease assets	$	69,701		$	71,466
Accrued expenses	$	15,378		$	15,828
Other liabilities		55,455			56,253
Total operating lease liabilities	$	70,833		$	72,081
Weighted-average remaining lease term (in years)		5.86			5.74
Weighted-average discount rate		5.12	%		5.71	%