Overview and Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2020

Accounting Policies [Abstract]

Unsatisfied Performance Obligations

Unsatisfied Performance Obligations

The following table includes estimated revenue expected to be recognized in future periods related to performance obligations that are unsatisfied or partially satisfied as of March 31, 2020 and the percentage of the outstanding performance obligations as of March 31, 2020 expected to be delivered during the remainder of 2020:

	Unsatisfied performance obligations at March 31, 2020
	Total Amount		Percent expected to be delivered in 2020
	(in millions)
Energy Equipment Group:
Wind towers and utility structures	$	475.6	82	%
Other	$	29.0	100	%
Transportation Products Group:
Inland barges	$	348.3	91	%

All unsatisfied performance obligations beyond 2020 are expected to be delivered during 2021.