Note 10 - Accounts Payable and Accrued Expenses (Tables)

12 Months Ended

Dec. 31, 2017

Notes Tables

Schedule of Accounts Payable and Accrued Liabilities [Table Text Block]

	December 31,
	2017		2016
	(Dollars in thousands)
Trade payables	$	64,289	$	48,309
Salaries and other payroll costs		19,888		17,977
Customer advances		1,177		576
Accrued interest		4,462		3,524
Income tax payable		43,682		8,824
Property tax payable		1,860		1,884
Scheduling and transmission		531		964
Royalty accrual		2,909		1,639
Other		14,998		7,953
Total	$	153,796	$	91,650