Committed Lines of Credit (Tables)

3 Months Ended

Mar. 31, 2020

Short-term Debt [Abstract]

Schedule of Line of Credit Facilities [Table Text Block]

Balances outstanding and interest rates of borrowings (excluding letters of credit) under the Company’s revolving committed line of credit were as follows as of March 31, 2020 and December 31, 2019 (dollars in thousands):

	March 31,			December 31,
	2020			2019
Balance outstanding at end of period	$	185,000		$	182,300
Letters of credit outstanding at end of period	$	32,983		$	21,473
Average interest rate at end of period	1.66		%	2.64		%