XML 33 R52.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Note 4 - Loans and Allowance for Loan Losses (Details) - Age Analysis of Past Due Loans (USD $) | Jun. 30, 2014 | Dec. 31, 2013 | Jun. 30, 2013
--- | --- | --- | ---
Commercial: |  |  |
Loans | $ 2,073,482,000 | $ 1,053,243,000 |
Loans, past due 89 days and accruing | 0 | 0 |
Originated Loan [Member] | Commercial and Industrial [Member] |  |  |
Commercial: |  |  |
Loans, past due 30 - 59 days | 0 | 0 |
Loans, past due 60 - 89 days | 0 | 0 |
Loans, past due greater than 89 days | 121,000 | 309,000 |
Loans, past due | 121,000 | 309,000 |
Loans, current | 342,254,000 | 286,064,000 |
Loans | 342,375,000 | 286,373,000 |
Loans, past due 89 days and accruing | 0 | 0 |
Originated Loan [Member] | Commercial Vacant Land and Land Development and Residential Construction Loan [Member] |  |  |
Commercial: |  |  |
Loans, past due 30 - 59 days | 0 | 0 |
Loans, past due 60 - 89 days | 0 | 0 |
Loans, past due greater than 89 days | 0 | 0 |
Loans, past due | 0 | 0 |
Loans, current | 32,214,000 | 36,741,000 |
Loans | 32,214,000 | 36,741,000 |
Loans, past due 89 days and accruing | 0 | 0 |
Originated Loan [Member] | Commercial Real Estate Owner Occupied Loan [Member] |  |  |
Commercial: |  |  |
Loans, past due 30 - 59 days | 35,000 | 65,000 |
Loans, past due 60 - 89 days | 0 | 0 |
Loans, past due greater than 89 days | 90,000 | 50,000 |
Loans, past due | 125,000 | 115,000 |
Loans, current | 264,471,000 | 261,762,000 |
Loans | 264,596,000 | 261,877,000 |
Loans, past due 89 days and accruing | 0 | 0 |
Originated Loan [Member] | Commercial Real Estate Non Owner Occupied Loan [Member] |  |  |
Commercial: |  |  |
Loans, past due 30 - 59 days | 0 | 0 |
Loans, past due 60 - 89 days | 0 | 0 |
Loans, past due greater than 89 days | 0 | 0 |
Loans, past due | 0 | 0 |
Loans, current | 399,855,000 | 364,066,000 |
Loans | 399,855,000 | 364,066,000 |
Loans, past due 89 days and accruing | 0 | 0 |
Originated Loan [Member] | Commercial Real Estate Multi Family and Residential Rental Loan [Member] |  |  |
Commercial: |  |  |
Loans, past due 30 - 59 days | 0 | 0 |
Loans, past due 60 - 89 days | 0 | 0 |
Loans, past due greater than 89 days | 0 | 64,000 |
Loans, past due | 0 | 64,000 |
Loans, current | 37,569,000 | 37,575,000 |
Loans | 37,569,000 | 37,639,000 |
Loans, past due 89 days and accruing | 0 | 0 |
Originated Loan [Member] | Commercial Portfolio Segment [Member] |  |  |
Commercial: |  |  |
Loans, past due 30 - 59 days | 35,000 | 65,000 |
Loans, past due 60 - 89 days | 0 | 0 |
Loans, past due greater than 89 days | 211,000 | 423,000 |
Loans, past due | 246,000 | 488,000 |
Loans, current | 1,076,363,000 | 986,208,000 |
Loans | 1,076,609,000 | 986,696,000 | 985,616,000
Loans, past due 89 days and accruing | 0 | 0 |
Originated Loan [Member] | Retail Home Equity and Other [Member] |  |  |
Commercial: |  |  |
Loans, past due 30 - 59 days | 2,000 | 14,000 |
Loans, past due 60 - 89 days | 0 | 0 |
Loans, past due greater than 89 days | 0 | 0 |
Loans, past due | 2,000 | 14,000 |
Loans, current | 35,149,000 | 35,066,000 |
Loans | 35,151,000 | 35,080,000 |
Loans, past due 89 days and accruing | 0 | 0 |
Originated Loan [Member] | Retail 1-4 Family Mortgages [Member] |  |  |
Commercial: |  |  |
Loans, past due 30 - 59 days | 0 | 21,000 |
Loans, past due 60 - 89 days | 0 | 44,000 |
Loans, past due greater than 89 days | 347,000 | 375,000 |
Loans, past due | 347,000 | 440,000 |
Loans, current | 32,990,000 | 31,027,000 |
Loans | 33,337,000 | 31,467,000 |
Loans, past due 89 days and accruing | 0 | 0 |
Originated Loan [Member] | Retail Loan [Member] |  |  |
Commercial: |  |  |
Loans, past due 30 - 59 days | 2,000 | 35,000 |
Loans, past due 60 - 89 days | 0 | 44,000 |
Loans, past due greater than 89 days | 347,000 | 375,000 |
Loans, past due | 349,000 | 454,000 |
Loans, current | 68,139,000 | 66,093,000 |
Loans | 68,488,000 | 66,547,000 | 73,046,000
Loans, past due 89 days and accruing | 0 | 0 |
Originated Loan [Member] |  |  |
Commercial: |  |  |
Loans, past due 30 - 59 days | 37,000 | 100,000 |
Loans, past due 60 - 89 days | 0 | 44,000 |
Loans, past due greater than 89 days | 558,000 | 798,000 |
Loans, past due | 595,000 | 942,000 |
Loans, current | 1,144,502,000 | 1,052,301,000 |
Loans | 1,145,097,000 | 1,053,243,000 | 1,058,662,000
Loans, past due 89 days and accruing | 0 | 0 |
Acquired Loan [Member] | Commercial and Industrial [Member] |  |  |
Commercial: |  |  |
Loans, past due 30 - 59 days | 587,000 |  |
Loans, past due 60 - 89 days | 19,000 |  |
Loans, past due greater than 89 days | 1,202,000 |  |
Loans, past due | 1,808,000 |  |
Loans, current | 271,876,000 |  |
Loans | 273,684,000 | 0 |
Loans, past due 89 days and accruing | 0 |  |
Acquired Loan [Member] | Commercial Vacant Land and Land Development and Residential Construction Loan [Member] |  |  |
Commercial: |  |  |
Loans, past due 30 - 59 days | 0 |  |
Loans, past due 60 - 89 days | 0 |  |
Loans, past due greater than 89 days | 748,000 |  |
Loans, past due | 748,000 |  |
Loans, current | 20,343,000 |  |
Loans | 21,091,000 | 0 |
Loans, past due 89 days and accruing | 0 |  |
Acquired Loan [Member] | Commercial Real Estate Owner Occupied Loan [Member] |  |  |
Commercial: |  |  |
Loans, past due 30 - 59 days | 363,000 |  |
Loans, past due 60 - 89 days | 0 |  |
Loans, past due greater than 89 days | 949,000 |  |
Loans, past due | 1,312,000 |  |
Loans, current | 118,506,000 |  |
Loans | 119,818,000 | 0 |
Loans, past due 89 days and accruing | 0 |  |
Acquired Loan [Member] | Commercial Real Estate Non Owner Occupied Loan [Member] |  |  |
Commercial: |  |  |
Loans, past due 30 - 59 days | 65,000 |  |
Loans, past due 60 - 89 days | 1,347,000 |  |
Loans, past due greater than 89 days | 1,436,000 |  |
Loans, past due | 2,848,000 |  |
Loans, current | 146,586,000 |  |
Loans | 149,434,000 | 0 |
Loans, past due 89 days and accruing | 0 |  |
Acquired Loan [Member] | Commercial Real Estate Multi Family and Residential Rental Loan [Member] |  |  |
Commercial: |  |  |
Loans, past due 30 - 59 days | 0 |  |
Loans, past due 60 - 89 days | 0 |  |
Loans, past due greater than 89 days | 0 |  |
Loans, past due | 0 |  |
Loans, current | 47,099,000 |  |
Loans | 47,099,000 | 0 |
Loans, past due 89 days and accruing | 0 |  |
Acquired Loan [Member] | Commercial Portfolio Segment [Member] |  |  |
Commercial: |  |  |
Loans, past due 30 - 59 days | 1,015,000 |  |
Loans, past due 60 - 89 days | 1,366,000 |  |
Loans, past due greater than 89 days | 4,335,000 |  |
Loans, past due | 6,716,000 |  |
Loans, current | 604,410,000 |  |
Loans | 611,126,000 | 0 |
Loans, past due 89 days and accruing | 0 |  |
Acquired Loan [Member] | Retail Home Equity and Other [Member] |  |  |
Commercial: |  |  |
Loans, past due 30 - 59 days | 681,000 |  |
Loans, past due 60 - 89 days | 142,000 |  |
Loans, past due greater than 89 days | 12,000 |  |
Loans, past due | 835,000 |  |
Loans, current | 133,722,000 |  |
Loans | 134,557,000 | 0 |
Loans, past due 89 days and accruing | 0 |  |
Acquired Loan [Member] | Retail 1-4 Family Mortgages [Member] |  |  |
Commercial: |  |  |
Loans, past due 30 - 59 days | 1,796,000 |  |
Loans, past due 60 - 89 days | 115,000 |  |
Loans, past due greater than 89 days | 860,000 |  |
Loans, past due | 2,771,000 |  |
Loans, current | 179,931,000 |  |
Loans | 182,702,000 | 0 |
Loans, past due 89 days and accruing | 0 |  |
Acquired Loan [Member] | Retail Loan [Member] |  |  |
Commercial: |  |  |
Loans, past due 30 - 59 days | 2,477,000 |  |
Loans, past due 60 - 89 days | 257,000 |  |
Loans, past due greater than 89 days | 872,000 |  |
Loans, past due | 3,606,000 |  |
Loans, current | 313,653,000 |  |
Loans | 317,259,000 | 0 |
Loans, past due 89 days and accruing | 0 |  |
Acquired Loan [Member] |  |  |
Commercial: |  |  |
Loans, past due 30 - 59 days | 3,492,000 |  |
Loans, past due 60 - 89 days | 1,623,000 |  |
Loans, past due greater than 89 days | 5,207,000 |  |
Loans, past due | 10,322,000 |  |
Loans, current | 918,063,000 |  |
Loans | 928,385,000 | 0 |
Loans, past due 89 days and accruing | 0 |  |
Commercial and Industrial [Member] |  |  |
Commercial: |  |  |
Loans | 616,059,000 | 286,373,000 |
Commercial Vacant Land and Land Development and Residential Construction Loan [Member] |  |  |
Commercial: |  |  |
Loans | 53,305,000 | 36,741,000 |
Commercial Real Estate Owner Occupied Loan [Member] |  |  |
Commercial: |  |  |
Loans | 384,414,000 | 261,877,000 |
Commercial Real Estate Non Owner Occupied Loan [Member] |  |  |
Commercial: |  |  |
Loans | 549,289,000 | 364,066,000 |
Commercial Real Estate Multi Family and Residential Rental Loan [Member] |  |  |
Commercial: |  |  |
Loans | 84,668,000 | 37,639,000 |
Commercial Portfolio Segment [Member] |  |  |
Commercial: |  |  |
Loans | 1,687,735,000 | 986,696,000 |
Retail Home Equity and Other [Member] |  |  |
Commercial: |  |  |
Loans | 169,708,000 | 35,080,000 |
Retail 1-4 Family Mortgages [Member] |  |  |
Commercial: |  |  |
Loans | 216,039,000 | 31,467,000 |
Retail Loan [Member] |  |  |
Commercial: |  |  |
Loans | $ 385,747,000 | $ 66,547,000 |

X
- Details
Name: | mbwm_CommercialAbstract0000
Namespace Prefix: | mbwm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Financing receivables that are less than 60 days past due but more than 29 days past due. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953401-111524 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Financing receivables that are less than 90 days past due but more than 59 days past due. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953401-111524 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Recorded investment in financing receivables that are 90 days or more past due and still accruing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5111-111524 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Financing receivables that are current. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953401-111524 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Financing receivables that are equal to or greater than 90 days past due. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953401-111524 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Recorded Investment in financing receivables that are past due at the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953401-111524 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentPastDue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5074-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522 + Details
Name: | us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant