Statements of Consolidated Equity (Shares) - shares shares in Thousands	Total	Preferred Stock	Common Stock	Treasury Stock
Beginning balance at Dec. 31, 2017	337,016	0	340,813	(3,797)
Issued:
401(k) and profit sharing		0
Ending balance at Mar. 31, 2018	337,598	0	341,544	(3,946)
Beginning balance at Dec. 31, 2017	337,016	0	340,813	(3,797)
Treasury Stock acquired	(166)	0	0	(166)
Issued:
Common stock private placement	24,964	0	24,964	0
Preferred stock	0	400	0	0
Employee stock purchase plan	111	0	111	0
Long-term incentive plan	494	0	494	0
401(k) and profit sharing	496		496	0
Ending balance at Jun. 30, 2018	362,915	400	366,878	(3,963)
Beginning balance at Mar. 31, 2018	337,598	0	341,544	(3,946)
Treasury Stock acquired	(17)	0	0	(17)
Issued:
Common stock private placement	24,964	0	24,964	0
Preferred stock	0	400	0	0
Employee stock purchase plan	64	0	64	0
Long-term incentive plan	74	0	74	0
401(k) and profit sharing	232	0	232	0
Ending balance at Jun. 30, 2018	362,915	400	366,878	(3,963)
Beginning balance at Dec. 31, 2018	372,363	420	376,326	(3,963)
Issued:
Preferred stock	0	20	0	0
Employee stock purchase plan	102	0	102	0
Long-term incentive plan	464	0	464	0
401(k) and profit sharing	320	0	320	0
Ending balance at Jun. 30, 2019	373,249	440	377,212	(3,963)
Beginning balance at Mar. 31, 2019	373,003	440	376,966	(3,963)
Issued:
Employee stock purchase plan	52	0	52	0
Long-term incentive plan	38	0	38	0
401(k) and profit sharing	156	0	156	0
Ending balance at Jun. 30, 2019	373,249	440	377,212	(3,963)