Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2017
Income Taxes (Textual)
Effective tax rate	6.42%
U.S. federal statutory rate	21.00%
State tax net of federal benefit	6.20%
U.S. corporate tax rate, prior year tax rate		35.00%
U.S. corporate tax rate, reduced tax rate	21.00%
Repatriation tax, description	The deemed inclusion from the repatriation tax increased from $3.9 million at the time of provision to $5.0 million at the time the calculation was finalized for the tax return.
Tax expense	$ 4,000