Note 6 - Senior Notes, Credit Facilities, and Capital Leases (Tables)

12 Months Ended

Dec. 31, 2016

Notes Tables

Schedule of Maturities of Long-term Debt [Table Text Block]

Twelve-month period ending December 31,
2017	$	34,822
2018		34,822
2019		34,822
2020		34,822
2021		518,107
Total		657,395
Less: interest		(150,895	)
Principal		506,500
Less: unamortized discount		(5,521	)
Long-term debt	$	500,979

Schedule of Line of Credit Facilities [Table Text Block]

Interest rates:
Spread over the London Interbank Offer Rate	2.25	-	3.25%
Spread over alternative base rate	1.25	-	2.25%
Standby fee per annum on undrawn amounts	0.50%
Covenant financial ratios:
Senior leverage ratio (debt secured by liens/EBITDA)	not more than 2.50:1
Leverage ratio (total debt less unencumbered cash/EBITDA)	not more than 4.00:1
Interest coverage ratio (EBITDA/interest expense)	not more than 3.00:1

Schedule of Future Minimum Lease Payments for Capital Leases [Table Text Block]

Twelve-month period ending December 31,
	2017	$	6,000
	2018		4,081
	2019		1,671
	2020		295
	Total		12,047
	Less: imputed interest		(556	)
	Net capital lease obligation	$	11,491