Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015
Unrealized gains on investment securities, before tax [Abstract]
Unrealized holding gains arising during period, before tax		$ 138	$ (1,427)
Less adjustment for impaired investments, before tax		(190)	(14)
Less adjustment for impaired investments, tax		(65)	(5)
Less adjustment for impaired investments, net of tax (2)	[1]	(125)	(9)
Less reclassification adjustment for gains realized in net income, before tax		1,431	900
Unrealized gains on investment securities, before tax		(1,103)	(2,313)
Actuarial gain (loss), before tax		(634)	73
Unrecognized benefit obligation expense, before tax [Abstract]
Less reclassification adjustment for amortization, before tax		173	275
Unrecognized benefit obligation		(461)	348
Unrealized loss on derivative instrument, before tax		61	(555)
Other comprehensive income net, before tax		(1,503)	(2,520)
Unrealized gains on investment securities, tax [Abstract]
Unrealized holding gains arising during period, tax		47	(603)
Less reclassification adjustment for gains realized in net income, tax		336	306
Unrealized gains on investment securities, tax		(224)	(904)
Unrealized loss on derivative instrument, tax		(21)	189
Other comprehensive income net, tax		(203)	(1,093)
Unrealized gains on investment securities [Abstract]
Unrealized holding gains arising during period, net of tax	[2]	91	(824)
Less reclassification adjustment for gains realized in net income, net of tax	[3]	1,095	594
Unrealized gains (losses) on investment securities, net of tax		(879)	(1,409)
Unrecognized benefit obligation expense [Abstract]
Less reclassification adjustment for amortization, net of tax	[4]	173	275
Unrecognized benefit obligation expense		(461)	348
Unrealized loss on derivative instrument, net of tax	[5]	40	(366)
Other comprehensive income (loss)		(1,300)	(1,427)
Unrecognized benefit obligation		(4,138)	(3,677)
Unrealized loss on AFS investments		(755)
Unrealized loss on AFS investments			124
Unrealized loss on derivative instrument		(326)	(366)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Total		(5,219)	(3,919)
Actuarial gain (loss), net of tax		(634)	73
Royal Bancshares [Member]
Unrecognized benefit obligation expense [Abstract]
Other comprehensive income (loss)		$ (1,300)	$ (1,427)

[1] Amounts are included in total other-than-temporary impairment on AFS investment securities on the Consolidated Statements of Income in total non-interest income, net of a $65 thousand and $5 thousand tax benefit for 2016 and 2015, respectively.

[2] Net of $47 thousand tax expense and $603 thousand tax benefit for 2016 and 2015, respectively.

[3] Amounts are included in net gains on the sale of AFS investment securities on the Consolidated Statements of Income in total non-interest income, net of $336 thousand and $306 thousand in taxes for 2016 and 2015, respectively.

[4] Amounts are included in salaries and benefits on the Consolidated Statements of Income in non-interest expense.

[5] Net of $21 thousand tax expense and $189 thousand tax benefit for 2016 and 2015, respectively.