CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash dividends declared, Common, per share (in dollars per share)	$ 0	$ 0	$ 0
Other Comprehensive Income (Loss), Tax	$ (2,427)	$ (1,384)	$ (14,196)
Vesting of restricted stock units, shares	384,134	269,924	80,598
Treasury shares repurchased, shares	0
SARS exercised, shares	28,109	8,965	0
Treasury Stock
Treasury shares repurchased, shares	1,321,072	0	0