CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	Feb. 28, 2019	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019		Jun. 30, 2018
Statement of Stockholders' Equity [Abstract]
Dividends Declared per Common Share		$ 0.30	$ 0.25	$ 0.60		$ 0.50
Accelerated Share Repurchases [Line Items]
Common stock purchases		$ 1,520	$ 1,016	$ 254,639	[1]	$ 2,344
Accelerate Share Repurchase
Accelerated Share Repurchases [Line Items]
Common stock purchases	$ 250,000			$ 250,000

[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 18 for additional information.