CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Feb. 28, 2019	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019		Sep. 30, 2018	Mar. 31, 2019
Statement of Stockholders' Equity [Abstract]
Dividends Declared per Common Share		$ 0.30	$ 0.25	$ 0.90		$ 0.75
Accelerated Share Repurchases [Line Items]
Common stock purchases		$ 1,367	$ 125,099	$ 256,006	[1]	$ 127,443
Accelerated share repurchases settlement receipt							$ 250,000
Accelerate Share Repurchase
Accelerated Share Repurchases [Line Items]
Common stock purchases	$ 250,000			$ 250,000
Accelerated share repurchases settlement receipt			$ 125,000			$ 125,000

[1] On February 28, 2019, the Corporation entered into a $250 million accelerated share repurchase transaction with respect to its common stock, which was accounted for as a treasury stock transaction. Refer to Note 19 for additional information.