Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Accounting Policies [Abstract]
Company owned OMHHF	83.68%
Noncontrolling interest	$ 7,024	$ 6,088
Carrying value of intangibles	$ 31,700	$ 31,700
Amortization of mortgage servicing rights period (in years)	10 years
Cash equivalents maximum maturity period of highly liquid investments (in days)	90 days
Securities
Property, Plant and Equipment [Line Items]
Number of business days for related transactions (in days)	3 days
Commodities
Property, Plant and Equipment [Line Items]
Number of business days for related transactions (in days)	1 day
Minimum
Property, Plant and Equipment [Line Items]
Loan forgiven over service period (in years)	3 years
Maximum
Property, Plant and Equipment [Line Items]
Loan forgiven over service period (in years)	5 years
Furniture, fixtures and equipment | Minimum
Property, Plant and Equipment [Line Items]
Depreciation and amortization on straight-line basis (in years)	3 years
Furniture, fixtures and equipment | Maximum
Property, Plant and Equipment [Line Items]
Depreciation and amortization on straight-line basis (in years)	7 years