Investments is Low Income Housing Tax Credits Investments in Qualified Affordable Housing Projects (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2019		Dec. 31, 2018
Investments in Affordable Housing Projects [Abstract]
Original investment value	$ 50,232		$ 50,232
Amortization Method Qualified Affordable Housing Project Investments	32,604		33,681
Capital commitment relating to low income housing project investments	3,643		3,935
Tax credits and benefits	5,611	[1]	5,407
Amortization of investments	4,405	[2]	4,377
Net income tax benefit	$ 1,205	[3]	$ 1,030

[1] (1) This amount reflects anticipated tax credits and tax benefits for the full year ended December 31, 2019.

[2] (2) The amortization amount reduces the tax credits and benefits anticipated for the full year ended December 31, 2019.

[3] (3) This amount represents the net tax benefit expected to be realized for the full year ended December 31, 2019 in determining the Company's effective tax rate.