Short-Term Borrowings and Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2020

Debt Disclosure [Abstract]

Outstanding Short Term Borrowings and Long Term Debt

The following table represents outstanding short-term borrowings and long-term debt at December 31, 2020 and 2019:

				Carrying Value
(Dollars in thousands)	Maturity	Principal value at December 31, 2020		December 31, 2020		December 31, 2019
Short-term borrowings:
Other short-term borrowings	(1)	$	20,553	$	20,553	$	17,430
Total short-term borrowings				$	20,553	$	17,430
Long-term debt:
3.50% Senior Notes	January 29, 2025	$	350,000	$	348,348	$	347,987
3.125% Senior Notes	June 5, 2030	500,000		495,280		—
Total long-term debt				$	843,628	$	347,987

(1)Represents cash collateral received from certain counterparties in relation to market value exposures of derivative contracts in our favor.

Aggregate Annual Maturities of Long-Term Debt Obligations

The aggregate annual maturities of long-term debt obligations as of December 31, 2020 are as follows:

Year ended December 31, (Dollars in thousands)	Amount
2021	$	—
2022	—
2023	—
2024	—
2025	348,348
2026 and thereafter	495,280
Total	$	843,628