Committed Lines of Credit (Tables)

6 Months Ended

Jun. 30, 2019

Short-term Debt [Abstract]

Schedule of Line of Credit Facilities [Table Text Block]

outstanding and interest rates of borrowings (excluding letters of credit) under the Company’s revolving committed line of credit were as follows as of June 30, 2019 and December 31, 2018 (dollars in thousands):

	June 30,			December 31,
	2019			2018
Balance outstanding at end of period (1)	$	169,000		$	190,000
Letters of credit outstanding at end of period	$	18,603		$	10,503
Average interest rate at end of period	3.26		%	3.18		%