Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2019

Equity [Abstract]

Schedule of Common Stock Outstanding Roll Forward

The changes in shares of Common and Treasury Stock are as follows:

(in thousands)	Common Shares Issued	Treasury Stock Shares		Common Shares Outstanding
Balance as of December 31, 2017	19,067	634		18,433
Net shares issued for stock awards	—	(205	)	205
Balance as of December 31, 2018	19,067	429		18,638
Net shares issued for Stock awards	—	(169	)	169
Shares issued to Weichai	4,050	—		4,050
Balance as of December 31, 2019	23,117	260		22,857