Borrowings (Tables)

12 Months Ended

Dec. 31, 2017

Debt Disclosure [Abstract]

Components of Long-Term Debt

The Company's borrowings at December 31, 2017 and 2016 were as follows:

	2017			2016
	(Dollars in thousands)
Senior Credit Facility:
Revolving credit facility, at a rate of 3.44% at December 31, 2017 and 2.27% at December 31, 2016, due 2022	$	349,000		$	210,000
Term loan facility, at a rate of 3.57% at December 31, 2017, due 2022	721,000			—
3.875% Convertible Senior Subordinated Notes due 2017	—			136,076
5.25% Senior Notes due 2024	250,000			250,000
4.875% Senior Notes due 2026	400,000			400,000
4.625% Senior Notes due 2027	500,000			—
Securitization program, at a rate of 2.31% at December 31, 2017 and 1.52% at December 31, 2016	50,000			50,000
	2,270,000			1,046,076
Less: Unamortized debt discount on 3.875% Convertible Senior Subordinated Notes due 2017	—			(2,707		)
Less: Unamortized debt issuance costs	(20,448		)	(10,046		)
	2,249,552			1,033,323
Current portion of borrowings	(86,625		)	(183,071		)
Long-term borrowings	$	2,162,927		$	850,252

Fair Value of Debt

The following table provides the fair value of the Company’s debt as of December 31, 2017 and 2016, categorized by the level of inputs within the fair value hierarchy used to measure fair value (see Note 10 to the consolidated financial statements for further information):

	Fair value of debt
	December 31, 2017		December 31, 2016
	(Dollars in thousands)
Level 1	$	—	$	344,765
Level 2	2,299,942		929,362
Total	$	2,299,942	$	1,274,127

Aggregate Amounts of Long-Term Debt

Debt Maturities

As of December 31, 2017, the aggregate amounts of long-term debt, demand loans and debt under the Company’s securitization program that will mature during each of the next four years and thereafter were as follows:

	(Dollars in thousands)
2018	$	86,625
2019	37,500
2020	51,563
2021	70,312
2022 and thereafter	2,024,000