Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital).

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Name:	us-gaap_StockRepurchasedAndRetiredDuringPeriodValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

EQUITY - Common Stock Repurchase Program (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Mar. 20, 2018	Feb. 25, 2018
Class of Stock [Line Items]
Stock repurchase program, authorized amount				$ 250,000,000.0	$ 100,000,000
Stock repurchased during period, value			$ 29,900,000
Common Stock [Member]
Class of Stock [Line Items]
Shares retired due to common stock repurchase program (in shares)	221,834	9,364,141	1,645,816
Stock repurchased during period, value	$ 4,300,000	$ 169,100,000