Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014
Unrealized gains on investment securities, before tax [Abstract]
Unrealized holding gains arising during period, before tax		$ (1,427)	$ 7,733
Less adjustment for impaired investments, before tax		(14)	(41)
Less adjustment for impaired investments, tax		(5)	(14)
Less adjustment for impaired investments, net of tax	[1]	(9)	(27)
Less reclassification adjustment for gains realized in net income, before tax		900	377
Unrealized gains on investment securities, before tax		(2,313)	7,397
Actuarial gain (loss), before tax		73	(1,314)
Unrecognized benefit obligation expense, before tax [Abstract]
Less reclassification adjustment for amortization, before tax		(275)	(218)
Unrecognized benefit obligation		348	(1,096)
Unrealized loss on derivative instrument, before tax		(555)	(187)
Other comprehensive income net, before tax		(2,520)	6,114
Unrealized gains on investment securities, tax [Abstract]
Unrealized holding gains arising during period, tax		(603)	2,598
Less reclassification adjustment for gains realized in net income, tax		306	128
Unrealized gains on investment securities, tax		(904)	2,484
Unrealized loss on derivative instrument, tax		(189)
Other comprehensive income net, tax		(1,093)	2,484
Unrealized gains on investment securities [Abstract]
Unrealized holding gains arising during period, net of tax		(824)	5,135
Less reclassification adjustment for gains realized in net income, net of tax	[2]	594	249
Unrealized gains (losses) on investment securities, net of tax		(1,409)	4,913
Unrecognized benefit obligation expense [Abstract]
Less reclassification adjustment for amortization, net of tax	[3]	(275)	(218)
Unrecognized benefit obligation expense		(348)	1,096
Unrealized loss on derivative instrument, net of tax		(366)	(187)
Other comprehensive income (loss)		(1,427)	3,630
Unrecognized benefit obligation		(3,677)	(4,025)
Unrealized gains (losses) on AFS investments		124	1,720
Accumulated other comprehensive loss		(3,919)	(2,492)
Actuarial gain (loss), net of tax		73	(1,314)
Royal Bancshares [Member]
Unrecognized benefit obligation expense [Abstract]
Other comprehensive income (loss)		$ (1,427)	$ 3,630

[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 $5 thousand and $14 thousand tax benefit for 2015 and 2014, respectively.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 $306 thousand and $128 thousand in taxes for 2015 and 2014, respectively.

[2] 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 $306 thousand and $128 thousand in taxes for 2015 and 2014, respectively.

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