Restatement (Details 3) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	[1]	$ 31,056	$ 31,775
Increase (decrease) attributable to net income (loss)	[1]	74	(5)
Balance, end of period	[1]	31,137	31,793
As Originally Reported
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period		31,219	31,859
Increase (decrease) attributable to net income (loss)		89	11
Balance, end of period		$ 31,315	$ 31,893

[1] Restated