Summary of Significant Accounting Policies - Investment - (Details)	12 Months Ended
	Dec. 31, 2016 USD ($) trust
Noncontrolling Interest [Line Items]
Number of Delaware trust affiliates | trust	2
Trust Preferred Securities [Abstract]
Aggregate principal balance	$ 774,000
Royal Bank [Member] | Crusader Servicing Corporation [Member]
Noncontrolling Interest [Line Items]
Total percentage of ownership interest (in hundredths)	80.00%
Royal Bank [Member] | Royal Bank America Leasing LP
Noncontrolling Interest [Line Items]
Total percentage of ownership interest (in hundredths)	60.00%
Royal Bancshares Capital Trust one and two [Member]
Trust Preferred Securities [Abstract]
Aggregate principal balance	$ 774