XML 61 R40.htm IDEA: XBRL DOCUMENT v2.4.0.8

STOCK-BASED COMPENSATION (Tables)

12 Months Ended

Dec. 31, 2013

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Restricted Stock Activity

A summary of restricted stock activity is as follows:

		2013								2012								2011
						Weighted								Weighted								Weighted
						Average								Average								Average
		Shares				Fair Value				Shares				Fair Value				Shares				Fair Value
Nonvested at beginning of year			66,100			$	14.30				38,650			$	6.20				73,955			$	11.02
Granted			0				NA				66,100				14.30				0				NA
Vested			0				NA				(38,266	)			6.20				(28,533	)			17.57
Forfeited			(2,300	)			14.30				(384	)			6.20				(6,772	)			10.99
Nonvested at end of year			63,800			$	14.30				66,100			$	14.30				38,650			$	6.20

Summary of Stock Option Activity

A summary of stock option activity is as follows:

		2013								2012								2011
						Weighted								Weighted								Weighted
						Average								Average								Average
						Exercise								Exercise								Exercise
		Shares				Price				Shares				Price				Shares				Price
Outstanding at beginning of year			152,896			$	26.15				214,903			$	22.40				262,042			$	21.18
Granted			0				NA				0				NA				0				NA
Exercised			(51,055	)			13.72				(50,930	)			10.83				(8,800	)			6.21
Forfeited or expired			(40,965	)			31.30				(11,077	)			23.77				(38,339	)			17.80
Outstanding at end of year			60,876			$	33.11				152,896			$	26.15				214,903			$	22.40
Options exercisable at year-end			60,876			$	33.11				152,896			$	26.15				212,643			$	22.57

Summary of Options Outstanding

Options outstanding at year-end 2013 were as follows:

		Outstanding												Exercisable
						Weighted Average				Weighted								Weighted
Range of						Remaining				Average								Average
Exercise						Contractual				Exercise								Exercise
Prices		Number				Life				Price				Number				Price
$6.21 - $ 8.00			2,700				1.9 Years			$	6.21				2,700			$	6.21
$16.01 - $ 20.00			2,845				0.9 Years				17.74				2,845				17.74
$32.01 - $ 36.00			51,863				1.4 Years				34.87				51,863				34.87
$40.01 - $ 44.00			3,468				0.8 Years				40.28				3,468				40.28
Outstanding at year end			60,876				1.4 Years			$	33.11				60,876			$	33.11

Summary of Information Related to Options Outstanding

Information related to options outstanding at year-end 2013, 2012 and 2011 is as follows:

		2013				2012				2011
Minimum exercise price		$	6.21			$	6.21			$	6.21
Maximum exercise price			40.28				40.28				40.28
Average remaining option term			1.4 Years				1.9 Years				2.8 Years

Summary of Stock Option Grants and Exercises

Information related to stock option grants and exercises during 2013, 2012 and 2011 follows:

		2013				2012				2011
Aggregate intrinsic value of stock options exercised		$	408,000			$	307,000			$	26,000
Cash received from stock option exercises			289,000				227,000				55,000
Tax benefit realized from stock option exercises			0				0				0
Weighted average per share fair value of stock options granted			NA				NA				NA

X

- Definition

Schedule of share based compensation arrangement by share based payment award options information related to stock option grants and exercised.

+ References

No definition available.

+ Details

Name:	mbwm_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsInformationRelatedToStockOptionGrantsAndExercisedTableTextBlock
Namespace Prefix:	mbwm_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Schedule of share based compensation shares authorized under stock option plans information related to option outstanding.

+ References

No definition available.

+ Details

Name:	mbwm_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansInformationRelatedToOptionOutstandingTableTextBlock
Namespace Prefix:	mbwm_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

Name:	us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

Name:	us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

Name:	us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration