CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Parenthetical) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Nov. 30, 2015	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash dividends declared, Common, per share (in dollars per share)	$ 0.051	$ 0	$ 0	$ 0.666
Other Comprehensive Income (Loss), Tax		$ (1,384)	$ (14,196)	$ (1,836)
Vesting of restricted stock units, shares		269,924,000	80,598,000	31,147,000
Treasury shares repurchased, shares				0
SARS exercised, shares		8,965,000	0	0
Treasury Stock
Treasury shares repurchased, shares		0	0	596,632