Regulatory Capital Requirements (Details) (USD $)	0 Months Ended
	Dec. 15, 2004	Dec. 31, 2014	Dec. 31, 2013
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier One Leverage Capital, Actual Amount		$ 148,045,000	$ 142,036,000
Tier One Leverage Capital, Actual Percent		8.76%	8.44%
Tier One Leverage Capital For Capital Adequacy Purposes, Amount		67,616,000	67,344,000
Tier One Leverage Capital For Capital Adequacy Purposes, Percent		4.00%	4.00%
Tier One Risk Based Capital, Actual Amount		148,045,000	142,036,000
Tier One Risk Based Capital, Actual Percent		15.70%	14.87%
Tier One Risk Based Capital For Capital Adequacy Purposes, Amount		37,724,000	38,216,000
Tier One Risk Based Capital For Capital Adequacy Purposes, Percent		4.00%	4.00%
Total Risk-Based Capital, Actual Amount		159,856,000	153,999,000
Total Risk-Based Capital, Actual Percent		16.95%	16.12%
Total Risk Based Capital For Capital Adequacy Purposes, Amount		75,447,000	76,433,000
Total Risk Based Capital For Capital Adequacy Purposes, Percent		8.00%	8.00%
Private placement, trust preferred securities, aggregate amount	20,000,000
Merchants Bank [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier One Leverage Capital, Actual Amount		145,823,000	139,144,000
Tier One Leverage Capital, Actual Percent		8.60%	8.24%
Tier One Leverage Capital For Capital Adequacy Purposes, Amount		64,816,000	67,530,000
Tier One Leverage Capital For Capital Adequacy Purposes, Percent		4.00%	4.00%
Tier One Leverage Capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount		87,770,000	84,413,000
Tier One Leverage Capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Percent		5.00%	5.00%
Tier One Risk Based Capital, Actual Amount		145,823,000	139,144,000
Tier One Risk Based Capital, Actual Percent		15.36%	14.47%
Tier One Risk Based Capital For Capital Adequacy Purposes, Amount		37,983,000	38,470,000
Tier One Risk Based Capital For Capital Adequacy Purposes, Percent		4.00%	4.00%
Tier One Risk Based Capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount		56,974,000	57,705,000
Tier One Risk Based Capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Percent		6.00%	6.00%
Total Risk-Based Capital, Actual Amount		157,704,000	151,176,000
Total Risk-Based Capital, Actual Percent		16.61%	15.72%
Total Risk Based Capital For Capital Adequacy Purposes, Amount		75,965,000	76,940,000
Total Risk Based Capital For Capital Adequacy Purposes, Percent		8.00%	8.00%
Total Risk Based Capital To Be Well-Capitalized Under Prompt Corrective Action Provisions, Amount		$ 94,957,000	$ 96,175,000
Total Risk Based Capital To Be Well-Capitalized Under Prompt Corrective Action Provisions, Percent		10.00%	10.00%