Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	dei_EntityLocationLineItems
Namespace Prefix:	dei_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Nature of Operations and Significant Accounting Policies - Organization (Details) - location	1 Months Ended	12 Months Ended
	Jan. 31, 2017	Dec. 31, 2016
Denver, Colorado
Organization
Number of branches		7
Number of branches closed	1
Boulder, Colorado
Organization
Number of branches		1
Vail, Colorado
Organization
Number of branches		1
Colorado Springs, Colorado
Organization
Number of branches		1
Fort Collins, Colorado
Organization
Number of branches		1
Phoenix, Arizona
Organization
Number of branches		4