Mercantile Bank (MBWM) 10-Q 8 Aug 14 2014 Q2 Quarterly report Financial data

Document_And_Entity_Informatio

Document And Entity Information	6 Months Ended
	Jun. 30, 2014	Aug. 08, 2014
Document and Entity Information [Abstract]	'	'
Entity Registrant Name	'MERCANTILE BANK CORPORATION	'
Document Type	'10-Q	'
Current Fiscal Year End Date	'--12-31	'
Entity Common Stock, Shares Outstanding	'	16,851,320
Amendment Flag	'false	'
Entity Central Index Key	'0001042729	'
Entity Current Reporting Status	'Yes	'
Entity Voluntary Filers	'No	'
Entity Filer Category	'Accelerated Filer	'
Entity Well-known Seasoned Issuer	'No	'
Document Period End Date	30-Jun-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q2	'

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (Current Period Unaudited) (USD $)	Jun. 30, 2014		Dec. 31, 2013
ASSETS	'		'
Cash and due from banks	$58,730,000		$17,149,000
Interest-bearing deposits	48,150,000		6,389,000
Federal funds sold	11,973,000		123,427,000
Total cash and cash equivalents	118,853,000		146,965,000
Securities available for sale	475,275,000	[1]	131,178,000	[1]
Federal Home Loan Bank stock	19,226,000	[2]	11,961,000	[2]
Loans	2,073,482,000		1,053,243,000
Allowance for loan losses	-20,856,000		-22,821,000
Loans, net	2,052,626,000		1,030,422,000
Premises and equipment, net	49,003,000		24,898,000
Bank owned life insurance	55,693,000		51,377,000
Goodwill	50,870,000		0
Core deposit intangible	17,213,000		0
Net deferred tax asset	9,238,000		17,754,000
Accrued interest receivable	7,711,000		3,649,000
Other real estate owned and repossessed assets	2,878,000		2,851,000
Other assets	20,696,000		5,911,000
Total assets	2,879,282,000		1,426,966,000
Deposits	'		'
Noninterest-bearing	515,646,000		224,580,000
Interest-bearing	1,787,615,000		894,331,000
Total deposits	2,303,261,000		1,118,911,000
Securities sold under agreements to repurchase	124,108,000		69,305,000
Federal Home Loan Bank advances	57,044,000		45,000,000
Subordinated debentures	54,131,000		32,990,000
Other borrowed money	14,348,000		1,620,000
Accrued interest and other liabilities	10,252,000		5,815,000
Total liabilities	2,563,144,000		1,273,641,000
Shareholders' equity	'		'
Preferred stock, no par value; 1,000,000 shares authorized; none issued	0		0
Common stock, no par value; 40,000,000 shares authorized; 16,839,175 shares outstanding at June 30, 2014 and 8,739,108 shares outstanding at December 31, 2013	318,452,000		162,999,000
Retained earnings (deficit)	673,000		-4,101,000
Accumulated other comprehensive income (loss)	-2,987,000		-5,573,000
Total shareholders’ equity	316,138,000		153,325,000
Total liabilities and shareholders’ equity	$2,879,282,000		$1,426,966,000
[1]	See Note 13 for a description of the fair value hierarchy as well as a disclosure of levels for classes of financial assets and liabilities.
[2]	It is not practical to determine the fair value of FHLB stock due to transferability restrictions.

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) (USD $)	Jun. 30, 2014	Dec. 31, 2013
Preferred stock, par value (in Dollars per share)	$0	$0
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	0	0
Common stock, par value (in Dollars per share)	$0	$0
Common stock, shares authorized	40,000,000	40,000,000
Common stock, shares outstanding	16,839,175	8,739,108

Condensed_Consolidated_Stateme

Condensed Consolidated Statements of Income (Unaudited) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Interest income	'	'	'	'
Loans, including fees	$16,657,000	$12,687,000	$28,756,000	$25,533,000
Securities, taxable	1,393,000	1,007,000	2,627,000	2,014,000
Securities, tax-exempt	374,000	257,000	557,000	552,000
Federal funds sold	41,000	35,000	109,000	89,000
Interest-bearing deposits	17,000	6,000	21,000	13,000
Total interest income	18,482,000	13,992,000	32,070,000	28,201,000
Interest expense	'	'	'	'
Deposits	2,272,000	2,223,000	4,307,000	4,543,000
Short-term borrowings	27,000	19,000	49,000	39,000
Federal Home Loan Bank advances	156,000	119,000	306,000	238,000
Other borrowings	474,000	319,000	791,000	615,000
Total interest expense	2,929,000	2,680,000	5,453,000	5,435,000
Net interest income	15,553,000	11,312,000	26,617,000	22,766,000
Provision for loan losses	-700,000	-1,500,000	-2,600,000	-3,000,000
Net interest income after provision for loan losses	16,253,000	12,812,000	29,217,000	25,766,000
Noninterest income	'	'	'	'
Services charges on accounts	522,000	384,000	887,000	758,000
Earnings on bank owned life insurance	282,000	350,000	581,000	688,000
Mortgage banking activities	349,000	225,000	412,000	477,000
Rental income from other real estate owned	43,000	156,000	99,000	355,000
Other income	1,092,000	657,000	1,815,000	1,321,000
Total noninterest income	2,288,000	1,772,000	3,794,000	3,599,000
Noninterest expense	'	'	'	'
Salaries and benefits	7,037,000	4,981,000	12,267,000	9,838,000
Occupancy	914,000	624,000	1,626,000	1,282,000
Furniture and equipment	368,000	256,000	615,000	512,000
FDIC insurance costs	224,000	175,000	401,000	420,000
Problem asset costs	-36,000	279,000	-56,000	410,000
Merger-related costs	3,453,000	46,000	3,830,000	60,000
Other expense	4,106,000	2,452,000	6,590,000	4,875,000
Total noninterest expenses	16,066,000	8,813,000	25,273,000	17,397,000
Income before federal income tax expense	2,475,000	5,771,000	7,738,000	11,968,000
Federal income tax expense	966,000	1,755,000	2,649,000	3,552,000
Net income	$1,509,000	$4,016,000	$5,089,000	$8,416,000
Basic earnings per share (in Dollars per share)	$0.13	$0.46	$0.50	$0.97
Diluted earnings per share (in Dollars per share)	$0.13	$0.46	$0.50	$0.97
Cash dividends per share (in Dollars per share)	$2.12	$0.11	$2.24	$0.21
Average basic shares outstanding (in Shares)	11,406,908	8,705,667	10,080,242	8,705,673
Average diluted shares outstanding (in Shares)	11,435,867	8,718,649	10,094,725	8,718,627

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Net income	$1,509,000	$4,016,000	$5,089,000	$8,416,000
Other comprehensive income (loss):	'	'	'	'
Unrealized holding gains (losses) on securities available for sale	1,537,000	-3,787,000	4,148,000	-4,789,000
Fair value of interest rate swap	-140,000	763,000	-126,000	797,000
	1,397,000	-3,024,000	4,022,000	-3,992,000
Tax effect of unrealized holding gains (losses) on securities available for sale	-568,000	1,325,000	-1,481,000	1,676,000
Tax effect of fair value of interest rate swap	49,000	-266,000	45,000	-226,000
	-519,000	1,059,000	-1,436,000	1,450,000
Other comprehensive income (loss), net of tax	878,000	-1,965,000	2,586,000	-2,542,000
Comprehensive income	$2,387,000	$2,051,000	$7,675,000	$5,874,000

Condensed_Consolidated_Stateme2

Condensed Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (USD $)	Preferred Stock [Member]	Common Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Balances at Dec. 31, 2012	$0	$166,074,000	($21,134,000)	$1,650,000	$146,590,000
Employee stock purchase plan (1,098 shares)	'	19,000	'	'	19,000
Dividend reinvestment plan (1,954 shares)	'	33,000	'	'	33,000
Stock-based compensation expense	'	236,000	'	'	236,000
Cash dividends	'	-1,814,000	'	'	-1,814,000
Net income	'	'	8,416,000	'	8,416,000
Change in net unrealized holding gain on securities available for sale, net of tax effect	'	'	'	-3,113,000	-3,113,000
Change in fair value of interest rate swap, net of tax effect	'	'	'	571,000	571,000
Balances at Jun. 30, 2013	0	164,548,000	-12,718,000	-892,000	150,938,000
Balances at Dec. 31, 2013	0	162,999,000	-4,101,000	-5,573,000	153,325,000
Stock option exercises (5,920 shares)	'	75,000	'	'	75,000
Stock grants to directors for retainer fees (7,375 shares)	'	155,000	'	'	155,000
Stock-based compensation expense	'	351,000	'	'	351,000
Cash dividends	'	-20,102,000	-315,000	'	-20,417,000
Common stock issued in connection with Firstbank merger (8,087,272 shares)	'	173,310,000	'	'	173,310,000
Stock options issued to replace existing Firstbank options at merger date	'	1,664,000	'	'	1,664,000
Net income	'	'	5,089,000	'	5,089,000
Change in net unrealized holding gain on securities available for sale, net of tax effect	'	'	'	2,667,000	2,667,000
Change in fair value of interest rate swap, net of tax effect	'	'	'	-81,000	-81,000
Balances at Jun. 30, 2014	$0	$318,452,000	$673,000	($2,987,000)	$316,138,000

Condensed_Consolidated_Stateme3

Condensed Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (Parentheticals) (USD $)	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Cash dividends per common share (in Dollars per share)	$2.24	$0.21
Common Stock [Member]	'	'
Stock option exercises	5,920	'
Stock grants to directors for retainer fees	7,375	'
Common stock issued in connection with Firstbank merger	8,087,272	'
Employee stock purchase plan, shares	'	1,098
Dividend reinvestment plan, shares	'	1,954

Condensed_Consolidated_Stateme4

Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Cash flows from operating activities	'	'
Net income	$5,089,000	$8,416,000
Adjustments to reconcile net income to net cash from operating activities	'	'
Depreciation and amortization	1,967,000	1,086,000
Accretion of acquired loans	-512,000	0
Provision for loan losses	-2,600,000	-3,000,000
Stock-based compensation expense	351,000	236,000
Proceeds from sales of mortgage loans held for sale	16,958,000	29,298,000
Origination of mortgage loans held for sale	-16,525,000	-28,383,000
Net gain from sales of mortgage loans held for sale	-383,000	-395,000
Net gain from sale and valuation write-down of foreclosed assets	-605,000	-895,000
Earnings on bank owned life insurance	-581,000	-688,000
Net change in:	'	'
Accrued interest receivable	312,000	214,000
Other assets	-1,678,000	11,930,000
Accrued interest and other liabilities	-5,844,000	-1,368,000
Net cash from (for) operating activities	-4,051,000	16,451,000
Cash flows from investing activities	'	'
Cash received in merger	91,806,000	0
Loan originations and payments, net	-75,655,000	-20,433,000
Purchases of securities available for sale	-11,679,000	-28,973,000
Proceeds from maturities, calls and repayments of securities available for sale	22,800,000	28,538,000
Proceeds from sales of securities available for sale	0	3,905,000
Proceeds from sales of foreclosed assets	1,940,000	5,659,000
Purchases of premises and equipment	-874,000	-134,000
Net cash from (for) investing activities	28,338,000	-11,438,000
Cash flows from financing activities	'	'
Net decrease in time deposits	-15,516,000	-51,608,000
Net decrease in all other deposits	-29,743,000	-22,281,000
Net increase (decrease) in securities sold under agreements to repurchase	319,000	-7,437,000
Net increase in other borrowed money	12,728,000	49,000
Proceeds from stock option exercises	75,000	0
Employee stock purchase plan	0	19,000
Dividend reinvestment plan	0	33,000
Stock grants to directors for retainer fee	155,000	0
Payment of cash dividends to common shareholders	-20,417,000	-1,814,000
Net cash for financing activities	-52,399,000	-83,039,000
Net change in cash and cash equivalents	-28,112,000	-78,026,000
Cash and cash equivalents at beginning of period	146,965,000	136,003,000
Cash and cash equivalents at end of period	118,853,000	57,977,000
Cash paid during the period for:	'	'
Interest	5,336,000	6,068,000
Federal income tax	1,400,000	0
Noncash financing and investing activities:	'	'
Transfers from loans to foreclosed assets	$175,000	$1,710,000

Note_1_Significant_Accounting_

Note 1 - Significant Accounting Policies	6 Months Ended
	Jun. 30, 2014
Accounting Policies [Abstract]	'
Significant Accounting Policies [Text Block]	'
	1.     SIGNIFICANT ACCOUNTING POLICIES
	Basis of Presentation: The unaudited financial statements for the six months ended June 30, 2014 include the consolidated results of operations of Mercantile Bank Corporation and its consolidated subsidiaries. These subsidiaries include Mercantile Bank of Michigan (“our bank”) and our bank’s two subsidiaries, Mercantile Bank Real Estate Co., LLC (“our real estate company”) and Mercantile Insurance Center, Inc. (“our insurance center”). These consolidated financial statements have been prepared in accordance with the instructions for Form 10-Q and Item 303(b) of Regulation S-K and do not include all disclosures required by accounting principles generally accepted in the United States of America for a complete presentation of our financial condition and results of operations. In the opinion of management, the information reflects all adjustments (consisting only of normal recurring adjustments) which are necessary in order to make the financial statements not misleading and for a fair presentation of the results of operations for such periods. The results for the period ended June 30, 2014 should not be considered as indicative of results for a full year. For further information, refer to the consolidated financial statements and footnotes included in our annual report on Form 10-K for the year ended December 31, 2013.
	We have five separate business trusts that were formed to issue trust preferred securities. Subordinated debentures were issued to the trusts in return for the proceeds raised from the issuance of the trust preferred securities. The trusts are not consolidated, but instead we report the subordinated debentures issued to the trusts as a liability.
	Earnings Per Share: Basic earnings per share is based on the weighted average number of common shares and participating securities outstanding during the period. Diluted earnings per share include the dilutive effect of additional potential common shares issuable under our stock-based compensation plans and are determined using the treasury stock method. Our unvested restricted shares, which contain non-forfeitable rights to dividends whether paid or accrued (i.e., participating securities), are included in the number of shares outstanding for both basic and diluted earnings per share calculations. In the event of a net loss, our unvested restricted shares are excluded from the calculation of both basic and diluted earnings per share.
	Stock options for approximately 159,000 shares of common stock were included in determining diluted earnings per share for the three and six months ended June 30, 2014. Stock options for approximately 177,000 shares of common stock were antidilutive and not included in determining diluted earnings per share for the three and six months ended June 30, 2014.
	Approximately 64,000 unvested restricted shares were included in determining both basic and diluted earnings per share for the three and six months ended June 30, 2013. In addition, stock options for approximately 21,000 shares of common stock were included in determining diluted earnings per share for the three and six months ended June 30, 2013. Stock options for approximately 132,000 shares of common stock were antidilutive and not included in determining diluted earnings per share for the three and six months ended June 30, 2013.
	Loans: Loans that we have the intent and ability to hold for the foreseeable future or until maturity or payoff are reported at the principal balance outstanding, net of deferred loan fees and costs and an allowance for loan losses. Interest income is accrued on the unpaid principal balance. Loan origination fees, net of certain direct origination costs, are deferred and recognized in interest income using the level-yield method without anticipating prepayments.
	Interest income on commercial loans and mortgage loans is discontinued at the time the loan is 90 days delinquent unless the loan is well-secured and in process of collection. Consumer and credit card loans are typically charged-off no later than when they are 120 days past due. Past due status is based on the contractual terms of the loan. In all cases, loans are placed on nonaccrual or charged-off at an earlier date if collection of principal and interest is considered doubtful.
	All interest accrued but not received for loans placed on nonaccrual is reversed against interest income. Interest received on such loans is accounted for on the cash-basis or cost-recovery method, until qualifying for return to accrual. Loans are returned to accrual status when all the principal and interest amounts contractually due are brought current and future payments are reasonably assured.
	Allowance for Loan Losses: The allowance for loan losses (“allowance”) is a valuation allowance for probable incurred credit losses. Loan losses are charged against the allowance when we believe the uncollectability of a loan is confirmed. Subsequent recoveries, if any, are credited to the allowance. We estimate the allowance balance required using past loan loss experience, the nature and volume of the portfolio, information about specific borrower situations and estimated collateral values, economic conditions and other factors. Allocations of the allowance may be made for specific loans, but the entire allowance is available for any loan that, in our judgment, should be charged-off.
	A loan is considered to be impaired when, based on current information and events, it is probable we will be unable to collect the scheduled payments of principal and interest when due according to the contractual terms of the loan agreement. Factors considered in determining impairment include payment status, collateral value and the probability of collecting scheduled principal and interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. We determine the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including the length of delay, the reasons for delay, the borrower’s prior payment record and the amount of the shortfall in relation to the principal and interest owed. Impairment is measured on a loan-by-loan basis for commercial and construction loans by either the present value of expected future cash flows discounted at the loan’s effective interest rate, the loan’s obtainable market price or the fair value of collateral if the loan is collateral dependent. Large groups of smaller balance homogeneous loans are collectively evaluated for impairment.
	Troubled Debt Restructurings: A loan is accounted for as a troubled debt restructuring if we, for economic or legal reasons, grant a concession to a borrower considered to be experiencing financial difficulties that we would not otherwise consider. A troubled debt restructuring may involve the receipt of assets from the debtor in partial or full satisfaction of the loan, or a modification of terms such as a reduction of the stated interest rate or balance of the loan, a reduction of accrued interest, an extension of the maturity date or renewal of the loan at a stated interest rate lower than the current market rate for a new loan with similar risk, or some combination of these concessions. Troubled debt restructurings can be in either accrual or nonaccrual status. Nonaccrual troubled debt restructurings are included in nonperforming loans. Accruing troubled debt restructurings are generally excluded from nonperforming loans as it is considered probable that all contractual principal and interest due under the restructured terms will be collected.
	In accordance with current accounting guidance, loans modified as troubled debt restructurings are, by definition, considered to be impaired loans. Impairment for these loans is measured on a loan-by-loan basis similar to other impaired loans as described above under “Allowance for Loan Losses.” Certain loans modified as troubled debt restructurings may have been previously measured for impairment under a general allowance methodology (i.e., pooling), thus at the time the loan is modified as a troubled debt restructuring the allowance will be impacted by the difference between the results of these two measurement methodologies. Loans modified as troubled debt restructurings that subsequently default are factored into the determination of the allowance in the same manner as other defaulted loans.
	Investments: Investments are presented at fair value as required by accounting principles. Our investment portfolio is classified as available for sale, as such: adjustments to the fair value are reported as a change in equity. If a security is deemed to be other than temporarily impaired, the adjustment to fair value is recorded through the income statement.
	Securities available for sale consist of bonds and notes which might be sold prior to maturity due to changes in interest rates, prepayment risks, yield and availability of alternative investments, liquidity needs or other factors. Securities classified as available for sale are reported at their fair value and the related unrealized holding gain or loss (the difference between the fair value and amortized cost of the securities so classified) is reported in other comprehensive income. Other securities such as Federal Home Loan Bank stock are carried at cost. Interest income includes amortization of purchase premium or accretion of purchase discount. Premiums and discounts on securities are amortized or accreted on the level-yield method. Gains and losses on sales are recorded on the trade date and are determined using the specific identification method.
	Declines in the fair value of securities below their cost that are other than temporary are reflected as realized losses. In estimating other-than-temporary losses, management considers: (1) the length of time and extent that fair value has been less than carrying value; (2) the financial condition and near-term prospects of the issuer; and (3) the Company’s ability and intent to hold the security for a period of time sufficient to allow for any anticipated recovery in fair value.
	Loans Held for Sale: Mortgage loans originated and intended for sale in the secondary market are carried at the lower of aggregate cost or market, as determined by outstanding commitments from investors. Net unrealized losses, if any, are recorded as a valuation allowance and charged to earnings. As of June 30, 2014 and December 31, 2013, we determined that the fair value of our mortgage loans held for sale approximated the recorded cost of $1.9 million and $1.1 million, respectively.
	Mortgage loans held for sale are generally sold with servicing rights retained. Gains and losses on sales of mortgage loans are based on the difference between the selling price and the carrying value of the related loan sold, which is reduced by the cost allocated to the servicing right. We generally lock in the sale price to the purchaser of the loan at the same time we make a rate commitment to the borrower. These mortgage banking activities are not designated as hedges and are carried at fair value. The net gain or loss on mortgage banking derivatives is included in the gain on sale of loans. Mortgage loans serviced for others totaled $593.0 million as of June 30, 2014.
	Mortgage Banking Activities: Servicing rights are recognized as assets based on the allocated fair value of retained servicing rights on loans sold. Servicing rights are carried at the lower of amortized cost or fair value and are expensed in proportion to, and over the period of, estimated net servicing income. Impairment is evaluated quarterly based on the fair value of the servicing rights, using groupings of the underlying loans as to interest rates, types of loans, loan size, term and other factors. Any temporary impairment of a grouping is reported as a valuation allowance which is recovered when impairment no longer exists. Other-than-temporary impairments are recorded as a direct write-down to the carrying value of the servicing assets.
	Servicing fee income is recorded for fees earned for servicing loans. The fees are based on a contractual percentage of the outstanding principal or a fixed amount per loan and are recorded as income when earned. Amortization of mortgage servicing rights is netted against loan servicing income in the income statement.
	Derivatives: Derivative financial instruments are recognized as assets or liabilities at fair value. The accounting for changes in the fair value of derivatives depends on the use of the derivatives and whether the derivatives qualify for hedge accounting. Used as part of our asset and liability management to help manage interest rate risk, our derivatives have generally consisted of interest rate swap agreements that qualified for hedge accounting. In February 2012, we entered into an interest rate swap agreement that qualifies for hedge accounting. The current outstanding interest rate swap is discussed in more detail in Note 11. We do not use derivatives for trading purposes.
	Changes in the fair value of derivatives that are designated, for accounting purposes, as a hedge of the variability of cash flows to be received on various loans and are effective are reported in other comprehensive income. They are later reclassified into earnings in the same periods during which the hedged transaction affects earnings and are included in the line item in which the hedged cash flows are recorded. If hedge accounting does not apply, changes in the fair value of derivatives are recognized immediately in current earnings as interest income or expense.
	If designated as a hedge, we formally document the relationship between derivatives as hedged items, as well as the risk-management objective and the strategy for undertaking hedge transactions. This documentation includes linking cash flow hedges to specific assets and liabilities on the balance sheet. If designated as a hedge, we also formally assess, both at the hedge’s inception and on an ongoing basis, whether the derivative instruments that are used are highly effective in offsetting changes in cash flows of the hedged items. Ineffective hedge gains and losses are recognized immediately in current earnings as noninterest income or expense. We discontinue hedge accounting when we determine the derivative is no longer effective in offsetting changes in the cash flows of the hedged item, the derivative is settled or terminates, or treatment of the derivative as a hedge is no longer appropriate or intended.
	Goodwill and Core Deposit Intangible: Goodwill results from business acquisitions and represents the excess of the purchase price over the fair value of acquired tangible assets and liabilities and identifiable intangible assets. Goodwill is assessed at least annually for impairment and any such impairment is recognized in the period identified. A more frequent assessment is performed if conditions in the market place or changes in the company’s organizational structure occur. We use a discounted income approach and a market valuation model, which compares the inherent value of our company to valuations of recent transactions in the market place to determine if our goodwill has been impaired.
	The core deposit intangible that arose from the Firstbank Corporation acquisition was initially measured at fair value and is being amortized into noninterest expense over a ten-year period using the sum-of-the-years-digits methodology.
	Adoption of New Accounting Standards: In January of 2014, the FASB issued ASU 2014-04, Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans upon Foreclosure. This ASU clarifies that an in substance repossession or foreclosure occurs, and a creditor is considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan, upon either (1) the creditor obtaining legal title to the residential real estate property upon completion of a foreclosure or (2) the borrower conveying all interest in the residential real estate property to the creditor to satisfy that loan through completion of a deed in lieu of foreclosure or through a similar legal agreement. The ASU also requires additional related interim and annual disclosures. The guidance in this ASU is effective for annual and interim periods beginning after December 15, 2014. The adoption of this ASU is not expected to have a material effect on our financial position or results of operations.
	In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers. This ASU establishes a comprehensive revenue recognition standard for virtually all industries under U.S. GAAP, including those that previously followed industry-specific guidance such as the real estate, construction and software industries. The revenue standard’s core principle is built on the contract between a vendor and a customer for the provision of goods and services. It attempts to depict the exchange of rights and obligations between the parties in the pattern of revenue recognition based on the consideration to which the vendor is entitled. To accomplish this objective, the standard requires five basic steps: i) identify the contract with the customer, (ii) identify the performance obligations in the contract, (iii) determine the transaction price, (iv) allocate the transaction price to the performance obligations in the contract, and (v) recognize revenue when (or as) the entity satisfies a performance obligation. This ASU is effective for annual and interim periods beginning after December 15, 2016 with three transition methods available – full retrospective, retrospective and cumulative effect approach. Adoption of this ASU is not expected to have a material effect on our financial position or results of operations.
	In June 2014, the FASB issued ASU 2014-11, Repurchase-to-Maturity Transactions, Repurchase Financings, and Disclosures. This ASU requires two accounting changes. First, repurchase-to-maturity transactions will be accounted for as secured borrowing transactions on the balance sheet, rather than sales. Second, for repurchase financing arrangements, the ASU requires separate accounting for a transfer of a financial asset executed contemporaneously with (or in contemplation of) a repurchase agreement with the same counterparty, which also will generally result in secured borrowing accounting for the repurchase agreement. The ASU also introduces new disclosures to increase transparency about the types of collateral pledged for repurchase agreements, securities lending transactions, and repurchase-to-maturity transactions that are accounted for as secured borrowings. The ASU also requires a transferor to disclose information about transactions accounted for as a sale in which the transferor retains substantially all of the exposure to the economic return on the transferred financial assets through an agreement with the transferee. The accounting changes and disclosure for certain transactions accounted for as a sale are effective for the first interim or annual period beginning after December 15, 2014. The disclosure for transactions accounted for as secured borrowings is required for annual periods beginning after December 15, 2014, and for interim periods beginning after March 15, 2015. Adoption of this ASU is not expected to have a material effect on our financial position or results of operations.

Note_2_Business_Combination

Note 2 - Business Combination	6 Months Ended
	Jun. 30, 2014
Business Combinations [Abstract]	'
Business Combination Disclosure [Text Block]	'
	2.     BUSINESS COMBINATION
	We completed the merger of Firstbank Corporation (“Firstbank”), a Michigan corporation with approximately $1.5 billion in total assets and 46 branch locations, into Mercantile Bank Corporation as of June 1, 2014 (“Merger Date”). The results of operations due to the Firstbank transaction have been included in Mercantile’s financial results since the Merger Date. All of Firstbank’s common stock was converted into the right to receive one share of Mercantile common stock for each share of Firstbank common stock. The conversion of Firstbank’s common stock into Mercantile’s common stock resulted in Mercantile issuing 8,087,272 shares of its common stock. The merger provided an expanded geographic footprint for the Company and increased the size of the balance sheet wherein the combined companies can realize economies of scale and other operating efficiencies. In conjunction with the completion of the merger, Mercantile assumed the obligations of Firstbank Capital Trust I, Firstbank Capital Trust II, Firstbank Capital Trust III and Firstbank Capital Trust IV.
	The Firstbank transaction was accounted for using the acquisition method of accounting and accordingly, assets acquired, liabilities assumed and consideration exchanged were recorded at estimated fair value on the Merger Date. Preliminary goodwill of $50.9 million was calculated as the purchase premium after adjusting for the fair value of net assets acquired and represents the value expected from the synergies created from combining the two banking organizations as well as the economies of scale expected from combining the operations of the two companies. None of the goodwill is deductible for income tax purposes as the merger is accounted for as a tax-free exchange.
	The following table provides the purchase price calculation as of the Merger Date and the identifiable assets purchased and the liabilities assumed at their estimated fair values. These fair value measurements are provisional based on third-party valuations that are currently under review and are subject to refinement for up to one year after the Merger Date based on additional information that may be obtained by us that existed as of the Merger Date.
	Mercantile common shares issued for Firstbank common shares				8,087,272
	Price per share, based on Mercantile closing price on May 30, 2014			$	21.43
	Value of common stock issued				173,310,000
	Replacement stock options				1,664,000
	Total purchase price			$	174,974,000
	Assets
	Cash and cash equivalents	$	91,806,000
	Securities		358,599,000
	Total loans		943,662,000
	Premises and equipment		24,049,000
	Core deposit intangible		17,478,000
	Mortgage servicing rights		7,389,000
	Other assets		8,500,000
	Total Assets	$	1,451,483,000
	Liabilities
	Deposits	$	1,229,609,000
	Borrowings		87,615,000
	Other liabilities		10,155,000
	Total Liabilities	$	1,327,379,000
	Net Identifiable Assets Acquired			$	124,104,000
	Goodwill			$	50,870,000
	The fair value of mortgage servicing rights was $7.4 million at the Acquisition Date. During the month of June 2014, new servicing rights amounting to less than $0.1 million and amortization expense of $0.1 million were recorded.
	Firstbank’s results of operations prior to the Merger Date are not included in our consolidated statements of income or consolidated statements of comprehensive income. The operations of the former Firstbank organization provided approximately $4.5 million in net interest income for the period from the Merger Date to June 30, 2014.
	We recorded merger-related expenses of $3.5 million and $3.8 million during the three month and six month periods ended June 30, 2014, respectively. Such expenses were generally for professional services, costs related to termination of existing contractual arrangements for various services, retention and severance compensation costs, marketing and promotional expenses, travel costs, and printing and supplies costs. Virtually all of Mercantile and Firstbank’s operating systems are now integrated.
	The following table provides the unaudited pro forma information for the results of operations for the three and six month periods ended June 30, 2014 and 2013, as if the acquisition had occurred on January 1 of each year. These adjustments reflect the impact of certain purchase accounting fair value measurements, primarily comprised of Firstbank’s loan and deposit portfolios. In addition, the $3.8 million in merger-related expenses noted earlier are included in each period presented. We expect to achieve further operating cost savings and other business synergies as a result of the merger which are not reflected in the pro forma amounts. These unaudited pro forma results are presented for illustrative purposes only and are not intended to represent or be indicative of the actual results of operations of the combined banking organization that would have been achieved had the merger occurred at the beginning of each period presented, nor are they intended to represent or be indicative of future results of operations.
		Three months ended June 30,				Six months ended June 30,
		2014		2013		2014		2013
	Net interest income	$	15,453,000	$	11,212,000	$	26,417,000	$	22,566,000
	Noninterest expense		17,160,000		13,407,000		26,862,000		22,786,000
	Net income		863,000		900,000		4,186,000		5,043,000
	Net income per diluted share		0.05		0.05		0.25		0.3
	In most instances, determining the fair value of the acquired assets and assumed liabilities required us to estimate cash flows expected to result from those assets and liabilities and to discount those cash flows at appropriate rates of interest. The most significant of those determinations relates to the valuation of acquired loans. For such loans, the excess of cash flows expected at acquisition over the estimated fair value is recognized as interest income over the remaining lives of the loans. The difference between contractually required payments at acquisition and the cash flows expected to be collected at acquisition reflects the impact of estimated credit losses and other factors, such as prepayments. In accordance with the applicable accounting guidance for business combinations, there was no carry-over of Firstbank’s previously established allowance for loan losses.
	The acquired loans were divided into loans with evidence of credit quality deterioration, which are accounted for under ASC 310-30 (“acquired impaired”), and loans that do not meet this criteria, which are accounted for under ASC 310-20 (“acquired non-impaired”). In addition, the loans are further categorized into different loan pools based primarily on the type and purpose of the loan.
	The provisional fair value of loans at the Acquisition Date is presented in the following table:
		Acquired		Acquired		Acquired
		Impaired		Non-Impaired		Total Loans
	Commercial Loans:
	Commercial & industrial	$	878,000	$	163,316,000	$	164,194,000
	Commercial real estate		12,973,000		378,016,000		390,989,000
	Construction & development		1,289,000		33,726,000		35,015,000
	Total Commercial Loans	$	15,140,000	$	575,058,000	$	590,198,000
	Consumer Loans:
	Residential mortgages	$	9,694,000	$	216,653,000	$	226,347,000
	Instalment		167,000		61,657,000		61,824,000
	Home equity lines		288,000		52,054,000		52,342,000
	Construction		76,000		12,875,000		12,951,000
	Total Consumer Loans	$	10,225,000	$	343,239,000	$	353,464,000
	Total Loans	$	25,365,000	$	918,297,000	$	943,662,000
	The following table presents data on acquired impaired loans at the Acquisition Date:
				Acquired
				Impaired
	Contractual required payments			$	44,936,000
	Nonaccretable difference				17,057,000
	Expected cash flows				27,879,000
	Accretable yield				2,514,000
	Carrying balance			$	25,365,000
	The nonaccretable difference includes $10.4 million in principal cash flows not expected to be collected, $2.8 million of pre-acquisition charge-offs and $3.9 million of future interest not expected to be collected. The unpaid principal balance of acquired performing loans was $926.4 million at the Acquisition Date, and the unaccreted discount on such loans was $8.1 million.
	We also assumed obligations under junior subordinated debentures with an aggregate balance of $36.1 million and an aggregate fair value of $21.1 million as of the Acquisition Date, payable to four unconsolidated trusts (Firstbank Capital Trust I, Firstbank Capital Trust II, Firstbank Capital Trust III, and Firstbank Capital Trust IV) that have issued trust preferred securities. The junior subordinated debentures are the sole assets of each trust. Interest rates on all trust preferred securities issued by the trusts are tied to the 90 Day Libor rate with spreads ranging from 135 basis points to 199 basis points, and reset quarterly. The trust preferred securities have maturity dates ranging from October, 2034 to July, 2037, and are callable by us in whole or in part quarterly. The junior subordinated debentures are unsecured obligations of Mercantile, who has guaranteed that interest payments on the junior subordinated debentures made to the trust will be distributed by the trust to the holders of the trust preferred securities. The trust preferred securities currently fully qualify as Tier 1 Capital, and under current risk-based capital guidelines, will remain fully qualified as Tier 1 Capital until maturity unless called by us at an earlier date.

Note_3_Securities

Note 3 - Securities	6 Months Ended
	Jun. 30, 2014
Investments, Debt and Equity Securities [Abstract]	'
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]	'
	3.     SECURITIES
	The amortized cost and fair value of available for sale securities and the related pre-tax gross unrealized gains and losses recognized in accumulated other comprehensive income (loss) are as follows:
				Gross			Gross
		Amortized		Unrealized			Unrealized			Fair
		Cost		Gains			Losses			Value
	30-Jun-14
	U.S. Government agency debt obligations	$	219,141,000	$	731,000		$	(6,166,000	)	$	213,706,000
	Mortgage-backed securities		107,145,000		1,249,000			(222,000	)		108,172,000
	Municipal general obligation bonds		139,996,000		894,000			(721,000	)		140,169,000
	Municipal revenue bonds		11,244,000		115,000			(35,000	)		11,324,000
	Other Investments		1,909,000		0			(5,000	)		1,904,000
		$	479,435,000	$	2,989,000		$	(7,149,000	)	$	475,275,000
	31-Dec-13
	U.S. Government agency debt obligations	$	108,279,000	$	263,000		$	(10,065,000	)	$	98,477,000
	Mortgage-backed securities		12,456,000		1,102,000			0			13,558,000
	Municipal general obligation bonds		16,488,000		388,000			(4,000	)		16,872,000
	Municipal revenue bonds		878,000		38,000			0			916,000
	Mutual funds		1,386,000		0			(31,000	)		1,355,000
		$	139,487,000	$	1,791,000		$	(10,100,000	)	$	131,178,000
	Securities with unrealized losses at June 30, 2014 and December 31, 2013, aggregated by investment category and length of time that individual securities have been in a continuous loss position, are as follows:
		Less than 12 Months					12 Months or More						Total
		Fair		Unrealized			Fair			Unrealized			Fair		Unrealized
		Value		Loss			Value			Loss			Value		Loss
	30-Jun-14
	U.S. Government agency debt obligations	$	90,627,000	$	(373,000	)	$	69,159,000		$	(5,793,000	)	$	159,786,000	$	(6,166,000	)
	Mortgage-backed securities		64,108,000		(222,000	)		0			0			64,108,000		(222,000	)
	Municipal general obligation bonds		92,461,000		(721,000	)		0			0			92,461,000		(721,000	)
	Municipal revenue bonds		7,775,000		(35,000	)		0			0			7,775,000		(35,000	)
	Other Investments		0		0			1,395,000			(5,000	)		1,395,000		(5,000	)
		$	254,971,000	$	(1,351,000	)	$	70,554,000		$	(5,798,000	)	$	325,525,000	$	(7,149,000	)
	31-Dec-13
	U.S. Government agency debt obligations	$	57,117,000	$	(5,798,000	)	$	29,679,000		$	(4,267,000	)	$	86,796,000	$	(10,065,000	)
	Mortgage-backed securities		0		0			0			0			0		0
	Municipal general obligation bonds		295,000		(4,000	)		0			0			295,000		(4,000	)
	Municipal revenue bonds		0		0			0			0			0		0
	Mutual funds		1,355,000		(31,000	)		0			0			1,355,000		(31,000	)
		$	58,767,000	$	(5,833,000	)	$	29,679,000		$	(4,267,000	)	$	88,446,000	$	(10,100,000	)
	We evaluate securities for other-than-temporary impairment at least on a quarterly basis. Consideration is given to the length of time and the extent to which the fair value has been less than cost, the financial condition and near-term prospects of the issuer, and the intent and ability we have to retain our investment in the issuer for a period of time sufficient to allow for any anticipated recovery in fair value. For those debt securities whose fair value is less than their amortized cost basis, we also consider our intent to sell the security, whether it is more likely than not that we will be required to sell the security before recovery and if we do not expect to recover the entire amortized cost basis of the security. In analyzing an issuer’s financial condition, we may consider whether the securities are issued by the federal government or its agencies, whether downgrades by bond rating agencies have occurred and the results of reviews of the issuer’s financial condition.
	At June 30, 2014, 452 debt securities and one mutual fund with fair values totaling $325.5 million have unrealized losses aggregating $7.1 million. After we considered whether the securities were issued by the federal government or its agencies and whether downgrades by bond rating agencies had occurred, we determined that unrealized losses were due to changing interest rate environments. As we do not intend to sell our debt securities before recovery of their cost basis and we believe it is more likely than not that we will not be required to sell our debt securities before recovery of the cost basis, no unrealized losses are deemed to be other-than-temporary.
	The amortized cost and fair value of debt securities at June 30, 2014, by maturity, are shown in the following table. The contractual maturity is utilized for U.S. Government agency debt obligations and municipal bonds. Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Securities not due at a single maturity date, primarily mortgage-backed securities, are shown separately. Weighted average yields are also reflected, with yields for municipal securities shown at their tax equivalent yield.
		Weighted
		Average		Amortized			Fair
		Yield		Cost			Value
	Due in 2014		0.86%	$	20,435,000		$	20,538,000
	Due in 2015 through 2019		1.25		178,246,000			182,962,000
	Due in 2020 through 2024		2.95		78,336,000			88,647,000
	Due in 2025 and beyond		3.63		89,198,000			73,052,000
	Mortgage-backed securities		1.73		103,209,000			108,172,000
	Other Investments		1.55		1,909,000			1,904,000
			2.07%	$	471,333,000		$	475,275,000
	Securities issued by the State of Michigan and all its political subdivisions had a combined amortized cost of $114.8 million and $17.4 million at June 30, 2014 and December 31, 2013, respectively, with estimated market values of $115.2 million and $17.8 million, respectively. Securities issued by all other states and their political subdivisions had a combined amortized cost of $36.4 million and estimated market value of $36.3 million at June 30, 2014. Total securities of any other specific issuer, other than the U.S. Government and its agencies and the State of Michigan and all its political subdivisions, did not exceed 10% of shareholders’ equity.
	The carrying value of U.S. Government agency debt obligations and mortgage-backed securities that are pledged to secure repurchase agreements was $272.6 million and $94.4 million at June 30, 2014 and December 31, 2013, respectively. Investments in Federal Home Loan Bank stock are restricted and may only be resold or redeemed by the issuer.

Note_4_Loans_and_Allowance_for

Note 4 - Loans and Allowance for Loan Losses	6 Months Ended
	Jun. 30, 2014
Receivables [Abstract]	'
Loans, Notes, Trade and Other Receivables Disclosure [Text Block]	'
	4.     LOANS AND ALLOWANCE FOR LOAN LOSSES
	Loans originated for investment are stated at their principal amount outstanding adjusted for partial charge-offs, the allowance, and net deferred loan fees and costs. Interest income on loans is accrued over the term of the loans primarily using the simple interest method based on the principal balance outstanding. Interest is not accrued on loans where collectability is uncertain. Accrued interest is presented separately in the consolidated balance sheet. Loan origination fees and certain direct costs incurred to extend credit are deferred and amortized over the term of the loan or loan commitment period as an adjustment to the related loan yield.
	Acquired loans are those purchased in the Firstbank merger (See Note 2 – Business Combination for further information). These loans were recorded at estimated fair value at the Acquisition Date with no carryover of the related allowance. The acquired loans were segregated between those considered to be performing (“acquired non-impaired loans”) and those with evidence of credit deterioration (“acquired impaired loans”). Acquired loans are considered impaired if there is evidence of credit deterioration and if it is probable, at acquisition, all contractually required payments will not be collected. Acquired loans restructured after acquisition are not considered or reported as troubled debt restructurings if the loans evidenced credit deterioration as of the Acquisition Date and are accounted for in pools. No acquired loans were modified as troubled debt restructurings after the Acquisition Date.
	The fair value estimates for acquired loans are based on expected prepayments and the amount and timing of discounted expected principal, interest and other cash flows. Credit discounts representing the principal losses expected over the life of the loan are also a component of the initial fair value. In determining the Acquisition Date fair value of acquired impaired loans, and in subsequent accounting, we have generally aggregated acquired commercial and consumer loans into pools of loans with common risk characteristics.
	The difference between the fair value of an acquired non-impaired loan and contractual amounts due at the Acquisition Date is accreted into income over the estimated life of the loan. Contractually required payments represent the total undiscounted amount of all uncollected principal and interest payments. Acquired non-impaired loans are placed on nonaccrual status and reported as nonperforming or past due using the same criteria applied to the originated loan portfolio.
	The excess of an acquired impaired loan’s contractually required payments over the amount of its undiscounted cash flows expected to be collected is referred to as the non-accretable difference. The non-accretable difference, which is neither accreted into income nor recorded on the consolidated balance sheet, reflects estimated future credit losses and uncollectible contractual interest expected to be incurred over the life of the acquired impaired loan. The excess cash flows expected to be collected over the carrying amount of the acquired loan is referred to as the accretable yield. This amount is accreted into interest income over the remaining life of the acquired loans or pools using the level yield method. The accretable yield is affected by changes in interest rate indices for variable rate loans, changes in prepayment speed assumptions and changes in expected principal and interest payments over the estimated lives of the acquired impaired loans.
	We evaluate quarterly the remaining contractual required payments receivable and estimate cash flows expected to be collected over the life of the impaired loans. Contractually required payments receivable may increase or decrease for a variety of reasons, for example, when the contractual terms of the loan agreement are modified, when interest rates on variable rate loans change, or when principal and/or interest payments are received. Cash flows expected to be collected on acquired impaired loans are estimated by incorporating several key assumptions similar to the initial estimate of fair value. These key assumptions include probability of default, loss given default, and the amount of actual prepayments after the Acquisition Date. Prepayments affect the estimated lives of loans and could change the amount of interest income, and possibly principal, expected to be collected. In re-forecasting future estimated cash flows, credit loss expectations are adjusted as necessary. The adjustments are based, in part, on actual loss severities recognized for each loan type, as well as changes in the probability of default. For periods in which estimated cash flows are not re-forecasted, the prior reporting period’s estimated cash flows are adjusted to reflect the actual cash received and credit events that transpired during the current reporting period.
	Increases in expected cash flows of acquired impaired loans subsequent to the Acquisition Date are recognized prospectively through adjustments of the yield on the loans or pools over their remaining lives, while decreases in expected cash flows are recognized as impairment through a provision for loan losses and an increase in the allowance.
	Our total loans at June 30, 2014 were $2.07 billion compared to $1.05 billion at December 31, 2013, an increase of $1.02 billion, or 96.9%. The components of our loan portfolio disaggregated by class of loan within the loan portfolio segments at June 30, 2014 and December 31, 2013, and the percentage change in loans from the end of 2013 to the end of the second quarter of 2014, are as follows:
															Percent
		30-Jun-14						31-Dec-13							Increase
		Balance				%		Balance				%			(Decrease)
	Originated loans
	Commercial:
	Commercial and industrial	$	342,375,000			29.9	%	$	286,373,000			27.2	%			19.6	%
	Vacant land, land development, and residential construction		32,214,000			2.8			36,741,000			3.5				(12.3	)
	Real estate – owner occupied		264,596,000			23.1			261,877,000			24.9				1
	Real estate – non-owner occupied		399,855,000			34.9			364,066,000			34.6				9.8
	Real estate – multi-family and residential rental		37,569,000			3.3			37,639,000			3.5				(0.2	)
	Total commercial		1,076,609,000			94			986,696,000			93.7				9.1
	Retail:
	Home equity and other		35,151,000			3.1			35,080,000			3.3				0.2
	1-4 family mortgages		33,337,000			2.9			31,467,000			3				5.9
	Total retail		68,488,000			6			66,547,000			6.3				2.9
	Total originated loans	$	1,145,097,000			100	%	$	1,053,243,000			100	%			8.7	%
														Percent
		30-Jun-14						31-Dec-13						Increase
		Balance				%		Balance			%			(Decrease)
	Acquired loans
	Commercial:
	Commercial and industrial	$	273,684,000			29.5	%	$	0		NA			NM
	Vacant land, land development, and residential construction		21,091,000			2.3			0		NA			NM
	Real estate – owner occupied		119,818,000			12.9			0		NA			NM
	Real estate – non-owner occupied		149,434,000			16.1			0		NA			NM
	Real estate – multi-family and residential rental		47,099,000			5.1			0		NA			NM
	Total commercial		611,126,000			65.8			0		NA			NM
	Retail:
	Home equity and other		134,557,000			14.5			0		NA			NM
	1-4 family mortgages		182,702,000			19.7			0		NA			NM
	Total retail		317,259,000			34.2			0		NA			NM
	Total acquired loans	$	928,385,000			100	%	$	0		NA			NM
															Percent
		30-Jun-14						31-Dec-13							Increase
		Balance			%			Balance			%				(Decrease)
	Total loans
	Commercial:
	Commercial and industrial	$	616,059,000			29.7	%	$	286,373,000			27.2	%			115.1	%
	Vacant land, land development, and residential construction		53,305,000			2.6			36,741,000			3.5				45.1
	Real estate – owner occupied		384,414,000			18.5			261,877,000			24.9				46.8
	Real estate – non-owner occupied		549,289,000			26.5			364,066,000			34.6				50.9
	Real estate – multi-family and residential rental		84,668,000			4.1			37,639,000			3.5				124.9
	Total commercial		1,687,735,000			81.4			986,696,000			93.7				71
	Retail:
	Home equity and other		169,708,000			8.2			35,080,000			3.3				383.8
	1-4 family mortgages		216,039,000			10.4			31,467,000			3				586.6
	Total retail		385,747,000			18.6			66,547,000			6.3				479.7
	Total loans	$	2,073,482,000			100	%	$	1,053,243,000			100	%			96.9	%
	The total outstanding balance and carrying value of acquired impaired loans was $42.6 million and $26.1 million, respectively, as of June 30, 2014. Changes in the accretable yield for acquired impaired loans for the three and six months ended June 30, 2014 were as follows:
	Balance at January 1, 2014	$	0
	Additions		2,514,000
	Accretion		(103,000	)
	Net reclassification from nonaccretable to accretable		0
	Disposals		0
Ending balance	$	2,411,000
Nonperforming originated loans as of June 30, 2014 and December 31, 2013 were as follows:
	June 30,			December 31,
	2014			2013
Loans past due 90 days or more still accruing interest	$	0		$	0
Nonaccrual loans		5,741,000			6,718,000
Total nonperforming originated loans	$	5,741,000		$	6,718,000
The recorded principal balance of nonaccrual loans was as follows:
	June 30,			December 31,
	2014			2013
Commercial:
Commercial and industrial	$	824,000		$	1,501,000
Vacant land, land development, and residential construction		235,000			785,000
Real estate – owner occupied		640,000			389,000
Real estate – non-owner occupied		129,000			168,000
Real estate – multi-family and residential rental		470,000			208,000
Total commercial		2,298,000			3,051,000
Retail:
Home equity and other		772,000			788,000
1-4 family mortgages		2,671,000			2,879,000
Total retail		3,443,000			3,667,000
Total nonaccrual loans	$	5,741,000		$	6,718,000
Acquired impaired loans are not subject to individual evaluation for impairment and are not reported as nonperforming loans based on acquired impaired loan accounting. Acquired non-impaired loans are placed on nonaccrual status and reported as nonperforming or past due using the same criteria applied to the originated loan portfolio.
An age analysis of past due loans is as follows as of June 30, 2014:
							Greater												Recorded
	30 – 59			60 – 89			Than 89												Balance > 89
	Days			Days			Days			Total							Total		Days and
	Past Due			Past Due			Past Due			Past Due				Current			Loans		Accruing
Originated loans
Commercial:
Commercial and industrial	$	0		$	0		$	121,000		$	121,000			$	342,254,000		$	342,375,000	$	0
Vacant land, land development, and residential construction		0			0			0			0				32,214,000			32,214,000		0
Real estate – owner occupied		35,000			0			90,000			125,000				264,471,000			264,596,000		0
Real estate – non-owner occupied		0			0			0			0				399,855,000			399,855,000		0
Real estate – multi-family and residential rental		0			0			0			0				37,569,000			37,569,000		0
Total commercial		35,000			0			211,000			246,000				1,076,363,000			1,076,609,000		0
Retail:
Home equity and other		2,000			0			0			2,000				35,149,000			35,151,000		0
1-4 family mortgages		0			0			347,000			347,000				32,990,000			33,337,000		0
Total retail		2,000			0			347,000			349,000				68,139,000			68,488,000		0
Total past due loans	$	37,000		$	0		$	558,000		$	595,000			$	1,144,502,000		$	1,145,097,000	$	0
							Greater												Recorded
	30 – 59			60 – 89			Than 89												Balance > 89
	Days			Days			Days			Total							Total		Days and
	Past Due			Past Due			Past Due			Past Due				Current			Loans		Accruing
Acquired loans
Commercial:
Commercial and  industrial	$	587,000		$	19,000		$	1,202,000		$	1,808,000			$	271,876,000		$	273,684,000	$	0
Vacant land, land development, and residential construction		0			0			748,000			748,000				20,343,000			21,091,000		0
Real estate – owner occupied		363,000			0			949,000			1,312,000				118,506,000			119,818,000		0
Real estate – non-owner occupied		65,000			1,347,000			1,436,000			2,848,000				146,586,000			149,434,000		0
Real estate – multi-family and residential rental		0			0			0			0				47,099,000			47,099,000		0
Total commercial		1,015,000			1,366,000			4,335,000			6,716,000				604,410,000			611,126,000		0
Retail:
Home equity  and other		681,000			142,000			12,000			835,000				133,722,000			134,557,000		0
1-4 family mortgages		1,796,000			115,000			860,000			2,771,000				179,931,000			182,702,000		0
Total retail		2,477,000			257,000			872,000			3,606,000				313,653,000			317,259,000		0
Total past due loans	$	3,492,000		$	1,623,000		$	5,207,000		$	10,322,000			$	918,063,000		$	928,385,000	$	0
An age analysis of past due loans is as follows as of December 31, 2013:
							Greater												Recorded
	30 – 59			60 – 89			Than 89												Balance > 89
	Days			Days			Days			Total							Total		Days and
	Past Due			Past Due			Past Due			Past Due				Current			Loans		Accruing
Originated loans
Commercial:
Commercial and industrial	$	0		$	0		$	309,000		$	309,000			$	286,064,000		$	286,373,000	$	0
Vacant land, land development, and residential construction		0			0			0			0				36,741,000			36,741,000		0
Real estate – owner occupied		65,000			0			50,000			115,000				261,762,000			261,877,000		0
Real estate – non-owner occupied		0			0			0			0				364,066,000			364,066,000		0
Real estate – multi-family and residential rental		0			0			64,000			64,000				37,575,000			37,639,000		0
Total commercial		65,000			0			423,000			488,000				986,208,000			986,696,000		0
Retail:
Home equity and other		14,000			0			0			14,000				35,066,000			35,080,000		0
1-4 family mortgages		21,000			44,000			375,000			440,000				31,027,000			31,467,000		0
Total retail		35,000			44,000			375,000			454,000				66,093,000			66,547,000		0
Total past due loans	$	100,000		$	44,000		$	798,000		$	942,000			$	1,052,301,000		$	1,053,243,000	$	0
Impaired loans as of June 30, 2014, and average impaired loans for the three and six months ended June 30, 2014, were as follows:
										Second Quarter				Year-To-Date
	Unpaid									Average				Average
	Contractual			Recorded						Recorded				Recorded
	Principal			Principal			Related			Principal				Principal
	Balance			Balance			Allowance			Balance				Balance
With no related allowance recorded
Commercial:
Commercial and industrial	$	1,620,000		$	132,000			-		$	169,000			$	283,000
Vacant land, land development and residential construction		0			0						171,000				235,000
Real estate – owner occupied		1,171,000			640,000						662,000				703,000
Real estate – non-owner occupied		578,000			577,000						1,169,000				1,024,000
Real estate – multi-family and residential rental		41,000			0						1,000				1,000
Total commercial		3,410,000			1,349,000						2,172,000				2,246,000
Retail:
Home equity and other		707,000			644,000						647,000				585,000
1-4 family mortgages		1,107,000			559,000						585,000				606,000
Total retail		1,814,000			1,203,000						1,232,000				1,191,000
Total with no related allowance recorded	$	5,224,000		$	2,552,000					$	3,404,000			$	3,437,000
										Second Quarter				Year-To-Date
	Unpaid									Average				Average
	Contractual			Recorded						Recorded				Recorded
	Principal			Principal			Related			Principal				Principal
	Balance			Balance			Allowance			Balance				Balance
With an allowance recorded
Commercial:
Commercial and industrial	$	939,000		$	810,000		$	322,000		$	882,000			$	1,068,000
Vacant land, land development and residential construction		3,614,000			3,300,000			351,000			3,604,000				3,782,000
Real estate – owner occupied		2,460,000			2,460,000			679,000			1,974,000				1,820,000
Real estate – non-owner occupied		17,753,000			17,731,000			7,414,000			18,591,000				19,418,000
Real estate – multi-family and residential rental		1,677,000			1,549,000			674,000			1,319,000				1,774,000
Total commercial		26,443,000			25,850,000			9,440,000			26,370,000				27,862,000
Retail:
Home equity and other		118,000			90,000			90,000			91,000				157,000
1-4 family mortgages		2,220,000			2,112,000			832,000			2,136,000				2,168,000
Total retail		2,338,000			2,202,000			922,000			2,227,000				2,325,000
Total with an allowance recorded	$	28,781,000		$	28,052,000		$	10,362,000		$	28,597,000			$	30,187,000
Total impaired loans:
Commercial	$	29,853,000		$	27,199,000		$	9,440,000		$	28,542,000			$	30,108,000
Retail		4,152,000			3,405,000			922,000			3,459,000				3,516,000
Total impaired loans	$	34,005,000		$	30,604,000		$	10,362,000		$	32,001,000			$	33,624,000
Acquired impaired loans are not subject to individual evaluation for impairment and are not reported as impaired loans based on acquired impaired loan accounting. Acquired non-impaired loans are placed on nonaccrual status and reported as impaired using the same criteria applied to the originated loan portfolio. In accordance with purchase accounting rules, acquired loans were recorded at fair value at the Acquisition Date and the prior allowance was eliminated. No allowance has been established on these acquired loans through June 30, 2014. Interest income of $0.4 million and $0.8 million was recognized on impaired loans during the second quarter and first six months of 2014, respectively.
Impaired loans as of June 30, 2013, and average impaired loans for the three and six months ended June 30, 2013, were as follows:
										Second Quarter				Year-To-Date
	Unpaid									Average				Average
	Contractual			Recorded						Recorded				Recorded
	Principal			Principal			Related			Principal				Principal
	Balance			Balance			Allowance			Balance				Balance
With no related allowance recorded
Commercial:
Commercial and industrial	$	2,793,000		$	1,277,000			-		$	1,416,000			$	1,483,000
Vacant land, land development and residential construction		1,543,000			1,010,000						1,194,000				1,263,000
Real estate – owner occupied		2,020,000			1,383,000						1,366,000				1,430,000
Real estate – non-owner occupied		8,067,000			5,194,000						4,956,000				5,134,000
Real estate – multi-family and residential rental		1,468,000			514,000						599,000				537,000
Total commercial		15,891,000			9,378,000						9,531,000				9,847,000
Retail:
Home equity and other		508,000			468,000						474,000				477,000
1-4 family mortgages		1,235,000			676,000						721,000				744,000
Total retail		1,743,000			1,144,000						1,195,000				1,221,000
Total with no related allowance recorded	$	17,634,000		$	10,522,000					$	10,726,000			$	11,068,000
										Second Quarter				Year-To-Date
	Unpaid									Average				Average
	Contractual			Recorded						Recorded				Recorded
	Principal			Principal			Related			Principal				Principal
	Balance			Balance			Allowance			Balance				Balance
With an allowance recorded
Commercial:
Commercial and industrial	$	1,708,000		$	1,587,000		$	1,154,000		$	2,046,000			$	2,006,000
Vacant land, land development and residential construction		5,058,000			4,515,000			1,223,000			2,998,000				2,738,000
Real estate – owner occupied		2,402,000			2,350,000			922,000			2,652,000				2,976,000
Real estate – non-owner occupied		29,249,000			29,233,000			9,672,000			29,778,000				30,840,000
Real estate – multi-family and residential rental		2,589,000			2,527,000			835,000			2,609,000				3,047,000
Total commercial		41,006,000			40,212,000			13,806,000			40,083,000				41,607,000
Retail:
Home equity and other		350,000			324,000			134,000			335,000				355,000
1-4 family mortgages		2,644,000			2,619,000			896,000			1,545,000				1,189,000
Total retail		2,994,000			2,943,000			1,030,000			1,880,000				1,544,000
Total with an allowance recorded	$	44,000,000		$	43,155,000		$	14,836,000		$	41,963,000			$	43,151,000
Total impaired loans:
Commercial	$	56,897,000		$	49,590,000		$	13,806,000		$	49,614,000			$	51,454,000
Retail		4,737,000			4,087,000			1,030,000			3,075,000				2,765,000
Total impaired loans	$	61,634,000		$	53,677,000		$	14,836,000		$	52,689,000			$	54,219,000
Interest income of $0.7 million and $1.3 million was recognized on impaired loans during the second quarter and first six months of 2013, respectively.
Credit Quality Indicators. We utilize a comprehensive grading system for our commercial loans. All commercial loans are graded on a ten grade rating system. The rating system utilizes standardized grade paradigms that analyze several critical factors such as cash flow, operating performance, financial condition, collateral, industry condition and management. All commercial loans are graded at inception and reviewed and, if appropriate, re-graded at various intervals thereafter. The risk assessment for retail loans is primarily based on the type of collateral and payment activity.
Credit quality indicators were as follows as of June 30, 2014:
Originated Loans
Commercial credit exposure – credit risk profiled by internal credit risk grades:
				Commercial										Commerical
				Vacant Land,			Commerical			Commercial				Real Estate -
	Commerical			Land Development,			Real Estate -			Real Estate -				Multi-Family
	and			and Residential			Owner			Non-Owner				and Residential
	Industrial			Construction			Occupied			Occupied				Rental
Internal credit risk grade groupings:
Grades 1 – 4	$	220,771,000		$	7,310,000		$	163,184,000		$	253,470,000			$	17,258,000
Grades 5 – 7		120,587,000			21,604,000			97,802,000			132,604,000				18,745,000
Grades 8 – 9		1,017,000			3,300,000			3,610,000			13,781,000				1,566,000
Total commercial	$	342,375,000		$	32,214,000		$	264,596,000		$	399,855,000			$	37,569,000
Retail credit exposure – credit risk profiled by collateral type:
	Retail			Retail
	Home Equity			1-4 Family
	and Other			Mortgages
Total retail	$	35,151,000		$	33,337,000
Acquired loans
Commercial credit exposure – credit risk profiled by internal credit risk grades:
				Commercial										Commerical
				Vacant Land,			Commerical			Commerical				Real Estate -
	Commercial			Land Development,			Real Estate -			Real Estate -				Multi-Family
	and			and Residential			Owner			Non-Owner				and Residential
	Industrial			Construction			Occupied			Occupied				Rental
Internal credit risk grade groupings:
Grades 1 – 4	$	111,223,000		$	4,240,000		$	28,670,000		$	44,344,000			$	19,438,000
Grades 5 – 7		154,550,000			15,552,000			83,142,000			100,032,000				27,051,000
Grades 8 – 9		7,911,000			1,299,000			8,006,000			5,058,000				610,000
Total commercial	$	273,684,000		$	21,091,000		$	119,818,000		$	149,434,000			$	47,099,000
Retail credit exposure – credit risk profiled by collateral type:
	Retail			Retail
	Home Equity			1-4 Family
	and Other			Mortgages
Total retail	$	134,557,000		$	182,702,000
Credit quality indicators were as follows as of December 31, 2013:
Originated loans
Commercial credit exposure – credit risk profiled by internal credit risk grades:
				Commerical										Commercial
				Vacant Land,			Commerical			Commercial				Real Estate -
	Commerical			Land Development,			Real Estate -			Real Estate				Multi-Family
	and			and Residential			Owner			Non-Owner				and Residential
	Industrial			Construction			Occupied			Occupied				Rental
Internal credit risk grade groupings:
Grades 1 – 4	$	208,151,000		$	6,973,000		$	156,230,000		$	219,325,000			$	15,465,000
Grades 5 – 7		76,237,000			25,535,000			103,066,000			122,717,000				19,469,000
Grades 8 – 9		1,985,000			4,233,000			2,581,000			22,024,000				2,705,000
Total commercial	$	286,373,000		$	36,741,000		$	261,877,000		$	364,066,000			$	37,639,000
Retail credit exposure – credit risk profiled by collateral type:
	Retail			Retail
	Home Equity			1-4 Family
	and Other			Mortgages
Total retail	$	35,080,000		$	31,467,000
All commercial loans are graded using the following criteria:
Grade 1.     Excellent credit rating that contain very little, if any, risk of loss.
Grade 2.     Strong sources of repayment and have low repayment risk.
Grade 3.     Good sources of repayment and have limited repayment risk.
Grade 4.    Adequate sources of repayment and acceptable repayment risk; however, characteristics are present that render the credit more vulnerable to a negative event.
Grade 5.     Marginally acceptable sources of repayment and exhibit defined weaknesses and negative characteristics.
Grade 6.     Well defined weaknesses which may include negative current cash flow, high leverage, or operating losses. Generally, if the credit does not stabilize or if further deterioration is observed in the near term, the loan will likely be downgraded and placed on the Watch List (i.e., list of lending relationships that receive increased scrutiny and review by the Board of Directors and senior management).
Grade 7.     Defined weaknesses or negative trends that merit close monitoring through Watch List status.
Grade 8.    Inadequately protected by current sound net worth, paying capacity of the obligor, or pledged collateral, resulting in a distinct possibility of loss requiring close monitoring through Watch List status.
Grade 9.     Vital weaknesses exist where collection of principal is highly questionable.
Grade 10.   Considered uncollectable and of such little value that continuance as an asset is not warranted.
The primary risk elements with respect to commercial loans are the financial condition of the borrower, the sufficiency of collateral, and timeliness of scheduled payments. We have a policy of requesting and reviewing periodic financial statements from commercial loan customers and employ a disciplined and formalized review of the existence of collateral and its value. The primary risk element with respect to each residential real estate loan and consumer loan is the timeliness of scheduled payments. We have a reporting system that monitors past due loans and have adopted policies to pursue creditor’s rights in order to preserve our collateral position.
Activity in the allowance for loan losses and the recorded investments in originated loans as of and during the three and six months ended June 30, 2014 are as follows:
	Commercial			Retail
	Loans			Loans			Unallocated			Total
Allowance for loan losses:
Balance at March 31, 2014	$	19,001,000		$	1,957,000		$	(4,000	)	$	20,954,000
Provision for loan losses		(334,000	)		(345,000	)		(21,000	)		(700,000	)
Charge-offs		(98,000	)		(5,000	)		0			(103,000	)
Recoveries		538,000			167,000			0			705,000
Ending balance	$	19,107,000		$	1,774,000		$	(25,000	)	$	20,856,000
Allowance for loan losses:
Balance at December 31, 2013	$	20,455,000		$	2,358,000		$	8,000		$	22,821,000
Provision for loan losses		(1,788,000	)		(779,000	)		(33,000	)		(2,600,000	)
Charge-offs		(684,000	)		(7,000	)		0			(691,000	)
Recoveries		1,124,000			202,000			0			1,326,000
Ending balance	$	19,107,000		$	1,774,000		$	(25,000	)	$	20,856,000
Ending balance: individually evaluated for impairment	$	9,440,000		$	922,000		$	0		$	10,362,000
Ending balance: collectively evaluated for impairment	$	9,667,000		$	852,000		$	(25,000	)	$	10,494,000
Total loans:
Ending balance	$	1,076,609,000		$	68,488,000					$	1,145,097,000
Ending balance: individually evaluated for impairment	$	27,199,000		$	3,405,000					$	30,604,000
Ending balance: collectively evaluated for impairment	$	1,049,410,000		$	65,083,000					$	1,114,493,000
In accordance with purchase accounting rules, acquired loans were recorded at fair value at the Acquisition Date and the prior allowance was eliminated. No allowance has been established on these acquired loans through June 30, 2014.
Activity in the allowance for loan losses and the recorded investments in originated loans as of and during the three and six months ended June 30, 2013 are as follows:
	Commercial			Retail
	Loans			Loans			Unallocated			Total
Allowance for loan losses:
Balance at March 31, 2013	$	23,717,000		$	2,302,000		$	16,000		$	26,035,000
Provision for loan losses		(1,480,000	)		(10,000	)		(10,000	)		(1,500,000	)
Charge-offs		(363,000	)		(19,000	)		0			(382,000	)
Recoveries		508,000			286,000			0			794,000
Ending balance	$	22,382,000		$	2,559,000		$	6,000		$	24,947,000
Allowance for loan losses:
Balance at December 31, 2012	$	26,043,000		$	2,645,000		$	(11,000	)	$	28,677,000
Provision for loan losses		(2,644,000	)		(373,000	)		17,000			(3,000,000	)
Charge-offs		(2,775,000	)		(22,000	)		0			(2,797,000	)
Recoveries		1,758,000			309,000			0			2,067,000
Ending balance	$	22,382,000		$	2,559,000		$	6,000		$	24,947,000
Ending balance: individually evaluated for impairment	$	13,806,000		$	1,030,000		$	0		$	14,836,000
Ending balance: collectively evaluated for impairment	$	8,576,000		$	1,529,000		$	6,000		$	10,111,000
Total loans:
Ending balance	$	985,616,000		$	73,046,000					$	1,058,662,000
Ending balance: individually evaluated for impairment	$	49,590,000		$	4,087,000					$	53,677,000
Ending balance: collectively ealuated for impairment	$	936,026,000		$	68,959,000					$	1,004,985,000
Loans modified as troubled debt restructurings during the three months ended June 30, 2014 were as follows:
				Pre-			Post-
				Modification			Modification
				Recorded			Recorded
	Number of			Principal			Principal
	Contracts			Balance			Balance
Originated loans
Commercial:
Commercial and industrial		0		$	0		$	0
Vacant land, land development and residential construction		0			0			0
Real estate – owner occupied		1			996,000			996,000
Real estate – non-owner occupied		0			0			0
Real estate – multi-family and residential rental		0			0			0
Total originated commercial		1			996,000			996,000
Retail:
Home equity and other		0			0			0
1-4 family mortgages		0			0			0
Total originated retail		0			0			0
Total originated loans		1		$	996,000		$	996,000
Acquired loans
Commercial:
Commercial and industrial		0		$	0		$	0
Vacant land, land development and residential construction		0			0			0
Real estate – owner occupied		0			0			0
Real estate – non-owner occupied		0			0			0
Real estate – multi-family and residential rental		0			0			0
Total acquired commercial		0			0			0
Retail:
Home equity and other		0			0			0
1-4 family mortgages		0			0			0
Total acquired retail		0			0			0
Total acquired loans		0		$	0		$	0
				Pre-			Post-
				Modification			Modification
				Recorded			Recorded
	Number of			Principal			Principal
	Contracts			Balance			Balance
Total loans
Commercial:
Commercial and industrial		0		$	0		$	0
Vacant land, land development and  residential construction		0			0			0
Real estate – owner occupied		1			996,000			996,000
Real estate – non-owner occupied		0			0			0
Real estate – multi-family and  residential rental		0			0			0
Total commercial		1			996,000			996,000
Retail:
Home equity and other		0			0			0
1-4 family mortgages		0			0			0
Total retail		0			0			0
Total loans		1		$	996,000		$	996,000
Loans modified as troubled debt restructurings during the six months ended June 30, 2014 were as follows:
				Pre-			Post-
				Modification			Modification
				Recorded			Recorded
	Number of			Principal			Principal
	Contracts			Balance			Balance
Originated loans
Commercial:
Commercial and industrial		1		$	14,000		$	14,000
Vacant land, land development and residential construction		0			0			0
Real estate – owner occupied		1			996,000			996,000
Real estate – non-owner occupied		1			146,000			146,000
Real estate – multi-family and residential rental		0			0			0
Total originated commercial		3			1,156,000			1,156,000
Retail:
Home equity and other		0			0			0
1-4 family mortgages		0			0			0
Total originated retail		0			0			0
Total originated loans		3		$	1,156,000		$	1,156,000
				Pre-			Post-
				Modification			Modification
				Recorded			Recorded
	Number of			Principal			Principal
	Contracts			Balance			Balance
Acquired loans
Commercial:
Commercial and industrial		0		$	0		$	0
Vacant land, land development and residential construction		0			0			0
Real estate – owner occupied		0			0			0
Real estate – non-owner occupied		0			0			0
Real estate – multi-family and residential rental		0			0			0
Total acquired commercial		0			0			0
Retail:
Home equity and other		0			0			0
1-4 family mortgages		0			0			0
Total acquired		0			0			0
Total acquired loans		0		$	0		$	0
Total loans
Commercial:
Commercial and industrial		1		$	14,000		$	14,000
Vacant land, land development and residential construction		0			0			0
Real estate – owner occupied		1			996,000			996,000
Real estate – non-owner occupied		1			146,000			146,000
Real estate – multi-family and residential rental		0			0			0
Total commercial		3			1,156,000			1,156,000
Retail:
Home equity and other		0			0			0
1-4 family mortgages		0			0			0
Total retail		0			0			0
Total loans		3		$	1,156,000		$	1,156,000
Loans modified as troubled debt restructurings during the three months ended June 30, 2013 were as follows:
				Pre-			Post-
				Modification			Modification
				Recorded			Recorded
	Number of			Principal			Principal
	Contracts			Balance			Balance
Originated loans
Commercial:
Commercial and industrial		1		$	60,000		$	60,000
Vacant land, land development and residential construction		2			3,247,000			3,247,000
Real estate – owner occupied		2			680,000			680,000
Real estate – non-owner occupied		0			0			0
Real estate – multi-family and residential rental		0			0			0
Total originated commercial		5			3,987,000			3,987,000
Retail:
Home equity and other		0			0			0
1-4 family mortgages		1			1,879,000			1,879,000
Total originated retail		1			1,879,000			1,879,000
Total originated loans		6		$	5,866,000		$	5,866,000
Loans modified as troubled debt restructurings during the six months ended June 30, 2013 were as follows:
				Pre-			Post-
				Modification			Modification
				Recorded			Recorded
	Number of			Principal			Principal
	Contracts			Balance			Balance
Originated loans
Commercial:
Commercial and industrial		1		$	60,000		$	60,000
Vacant land, land development and residential construction		2			3,247,000			3,247,000
Real estate – owner occupied		3			904,000			904,000
Real estate – non-owner occupied		2			2,068,000			2,068,000
Real estate – multi-family and residential rental		0			0			0
Total originated commercial		8			6,279,000			6,279,000
Retail:
Home equity and other		0			0			0
1-4 family mortgages		1			1,879,000			1,879,000
Total originated retail		1			1,879,000			1,879,000
Total originated loans		9		$	8,158,000		$	8,158,000
The following originated loans, modified as troubled debt restructurings within the previous twelve months, became over 30 days past due within the three months ended June 30, 2014 (amounts as of period end):
				Recprded
	Number of			Principal
	Contracts			Balance
Commercial:
Commercial and industrial		0		$	0
Vacant land, land development and residential construction		0			0
Real estate – owner occupied		0			0
Real estate – non-owner occupied		0			0
Real estate – multi-family and residential rental		0			0
Total commercial		0			0
Retail:
Home equity and other		0			0
1-4 family mortgages		0			0
Total retail		0			0
Total		0		$	0
The following originated loans, modified as troubled debt restructurings within the previous twelve months, became over 30 days past due within the six months ended June 30, 2014 (amounts as of period end):
				Recorded
	Number of			Principal
	Contracts			Balance
Commercial:
Commercial and industrial		0		$	0
Vacant land, land development and residential construction		0			0
Real estate – owner occupied		0			0
Real estate – non-owner occupied		0			0
Real estate – multi-family and residential rental		0			0
Total commercial		0			0
Retail:
Home equity and other		0			0
1-4 family mortgages		0			0
Total retail		0			0
Total		0		$	0
The following originated loans, modified as troubled debt restructurings within the previous twelve months, became over 30 days past due within the three months ended June 30, 2013 (amounts as of period end):
				Recorded
	Number of			Principal
	Contracts			Balance
Commercial:
Commercial and industrial		0		$	0
Vacant land, land development and residential construction		0			0
Real estate – owner occupied		0			0
Real estate – non-owner occupied		0			0
Real estate – multi-family and residential rental		0			0
Total commercial		0			0
Retail:
Home equity and other		0			0
1-4 family mortgages		0			0
Total retail		0			0
Total		0		$	0
The following originated loans, modified as troubled debt restructurings within the previous twelve months, became over 30 days past due within the six months ended June 30, 2013 (amounts as of period end):
				Recorded
	Number of			Principal
	Contracts			Balance
Commercial:
Commercial and industrial		0		$	0
Vacant land, land development and residential construction		0			0
Real estate – owner occupied		0			0
Real estate – non-owner occupied		0			0
Real estate – multi-family and residential rental		0			0
Total commercial		0			0
Retail:
Home equity and other		0			0
1-4 family mortgages		0			0
Total retail		0			0
Total		0		$	0
Activity for originated loans categorized as troubled debt restructurings during the three months ended June 30, 2014 is as follows:
				Commercial										Commercial
				Vacant Land,			Commercial			Commercial				Real Estate -
	Commercial			Land Development,			Real Estate -			Real Estate -				Multi-Family
	and			and Residential			Owner			Non-Owner				and Residential
	Industrial			Construction			Occupied			Occupied				Rental
Commercial Loan Portfolio:
Beginning Balance	$	1,404,000		$	4,250,000		$	1,756,000		$	21,629,000			$	732,000
Charge-Offs		(67,000	)		0			0			0				0
Payments		(161,000	)		(464,000	)		(42,000	)		(2,965,000	)			(13,000	)
Transfers to ORE		0			0			0			0				0
Net Additions/Deletions		0			0			997,000			0				0
Ending Balance	$	1,176,000		$	3,786,000		$	2,711,000		$	18,664,000			$	719,000
	Retail			Retail
	Home Equity			1-4 Family
	and Other			Mortgages
Retail Loan Portfolio:
Beginning Balance	$	0		$	2,122,000
Charge-Offs		0			0
Payments		0			(45,000	)
Transfers to ORE		0			0
Net Additions/Deletions		0			0
Ending Balance	$	0		$	2,077,000
Activity for originated loans categorized as troubled debt restructurings during the six months ended June 30, 2014 is as follows:
				Commercial										Commercial
				Vacant Land,			Commerical			Commercial				Real Estate -
	Commercial			Land Development,			Real Estate -			Real Estate -				Multi-Family
	and			and Residential			Owner			Non-Owner				and Residential
	Industrial			Construction			Occupied			Occupied				Rental
Commercial Loan Portfolio:
Beginning Balance	$	1,656,000		$	4,501,000		$	1,816,000		$	22,311,000			$	2,620,000
Charge-Offs		(67,000	)		0			(11,000	)		0				(420,000	)
Payments		(427,000	)		(3,613,000	)		(90,000	)		(3,966,000	)			(1,481,000	)
Transfers to ORE		0			0			0			0				0
Net Additions/Deletions		14,000			2,898,000			996,000			319,000				0
Ending Balance	$	1,176,000		$	3,786,000		$	2,711,000		$	18,664,000			$	719,000
	Retail			Retail
	Home Equity			1-4 Family
	and Other			Mortgages
Retail Loan Portfolio:
Beginning Balance	$	0		$	2,191,000
Charge-Offs		0			0
Payments		0			(114,000	)
Transfers to ORE		0			0
Net Additions/Deletions		0			0
Ending Balance	$	0		$	2,077,000
Activity for originated loans categorized as troubled debt restructurings during the three months ended June 30, 2013 is as follows:
				Commercial										Commercial
				Vacant Land,			Commercial			Commercial				Real Estate -
	Commercial			Land Development,			Real Estate -			Real Estate -				Multi-Family
	and			and Residential			Owner			Non-Owner				and Residential
	Industrial			Construction			Occupied			Occupied				Rental
Commercial Loan Portfolio:
Beginning Balance	$	3,269,000		$	2,327,000		$	3,879,000		$	35,003,000			$	2,958,000
Charge-Offs		0			(30,000	)		(70,000	)		(5,000	)			0
Payments		(1,063,000	)		(104,000	)		(979,000	)		(574,000	)			(183,000	)
Transfers to ORE		0			0			0			0				0
Net Additions/Deletions		60,000			3,247,000			749,000			0				0
Ending Balance	$	2,266,000		$	5,440,000		$	3,579,000		$	34,424,000			$	2,775,000
	Retail			Retail
	Home Equity			1-4 Family
	and Other			Mortgages
Retail Loan Portfolio:
Beginning Balance	$	0		$	152,000
Charge-Offs		0			0
Payments		0			(2,000	)
Transfers to ORE		0			0
Net Additions/Deletions		0			1,879,000
Ending Balance	$	0		$	2,029,000
Activity for originated loans categorized as troubled debt restructurings during the six months ended June 30, 2013 is as follows:
				Commercial										Commercial
				Vacant Land,			Commercial			Commercial				Real Estate -
	Commercial			Land Development,			Real Estate -			Real Estate -				Multi-Family
	and			and Residential			Owner			Non-Owner				and Residential
	Industrial			Construction			Occupied			Occupied				Rental
Commercial Loan Portfolio:
Beginning Balance	$	2,721,000		$	3,071,000		$	4,115,000		$	37,672,000			$	3,025,000
Charge-Offs		(34,000	)		(725,000	)		(70,000	)		(716,000	)			(15,000	)
Payments		(1,578,000	)		(153,000	)		(1,039,000	)		(3,786,000	)			(235,000	)
Transfers to ORE		(74,000	)		0			(363,000	)		(802,000	)			0
Net Additions/Deletions		1,231,000			3,247,000			936,000			2,056,000				0
Ending Balance	$	2,266,000		$	5,440,000		$	3,579,000		$	34,424,000			$	2,775,000
	Retail			Retail
	Home Equity			1-4 Family
	and Other			Mortgages
Retail Loan Portfolio:
Beginning Balance	$	0		$	155,000
Charge-Offs		0			0
Payments		0			(5,000	)
Transfers to ORE		0			0
Net Additions/Deletions		0			1,879,000
Ending Balance	$	0		$	2,029,000
The allowance related to originated loans categorized as troubled debt restructurings was as follows:
	June 30,			December 31,
	2014			2013
Commercial:
Commercial and industrial	$	60,000		$	187,000
Vacant land, land development, and residential construction		341,000			798,000
Real estate – owner occupied		679,000			528,000
Real estate – non-owner occupied		7,285,000			7,828,000
Real estate – multi-family and residential rental		499,000			1,010,000
Total commercial		8,864,000			10,351,000
Retail:
Home equity and other		0			0
1-4 family mortgages		0			0
Total retail		0			0
Total related allowance	$	8,864,000		$	10,351,000
In general, our policy dictates that a renewal or modification of an 8- or 9-rated commercial loan meets the criteria of a troubled debt restructuring, although we review and consider all renewed and modified loans as part of our troubled debt restructuring assessment procedures. Loan relationships rated 8 contain significant financial weaknesses, resulting in a distinct possibility of loss, while relationships rated 9 reflect vital financial weaknesses, resulting in a highly questionable ability on our part to collect principal; we believe borrowers warranting such ratings would have difficulty obtaining financing from other market participants. Thus, due to the lack of comparable market rates for loans with similar risk characteristics, we believe 8- or 9-rated loans renewed or modified were done so at below market rates. Loans that are identified as troubled debt restructurings are considered impaired and are individually evaluated for impairment when assessing these credits in our allowance for loan losses calculation.

Note_5_Premises_and_Equipment_

Note 5 - Premises and Equipment, Net	6 Months Ended
	Jun. 30, 2014
Property, Plant and Equipment [Abstract]	'
Property, Plant and Equipment Disclosure [Text Block]	'
	5.     PREMISES AND EQUIPMENT, NET
	Premises and equipment are comprised of the following:
		June 30,		December 31,
		2014		2013
	Land, buildings and improvements	$	55,352,000	$	33,289,000
	Furniture and equipment		15,518,000		12,718,000
			70,870,000		46,007,000
	Less: accumulated depreciation		21,867,000		21,109,000
	Premises and equipment, net	$	49,003,000	$	24,898,000
	Depreciation expense totaled $0.5 million during the second quarter of 2014, compared to $0.3 million during the second quarter of 2013. Depreciation expense totaled $0.8 million during the first six months of 2014, compared to $0.7 million during the first six months of 2013.

Note_6_Deposits

Note 6 - Deposits	6 Months Ended
	Jun. 30, 2014
Disclosure Text Block [Abstract]	'
Deposit Liabilities Disclosures [Text Block]	'
	6.     DEPOSITS
	Our total deposits at June 30, 2014 totaled $2.30 billion compared to $1.12 billion at December 31, 2013, an increase of $1.18 billion, or 105.8%. A vast majority of the increase reflects the consummation of the merger with Firstbank effective June 1, 2014. The components of our outstanding balances at June 30, 2014 and December 31, 2013, and percentage change in deposits from the end of 2013 to the end of the second quarter of 2014, are as follows:
												Percent
		30-Jun-14					31-Dec-13					Increase
		Balance		%			Balance		%			(Decrease)
	Noninterest-bearing checking	$	515,646,000		22.4	%	$	224,580,000		20.1	%		129.6	%
	Interest-bearing checking		424,362,000		18.4			197,388,000		17.6			115
	Money market		237,798,000		10.3			133,369,000		11.9			78.3
	Savings		341,924,000		14.8			52,606,000		4.7			550
	Time, under $100,000		208,417,000		9.1			43,251,000		3.9			381.9
	Time, $100,000 and over		387,305,000		16.8			254,600,000		22.8			52.1
			2,115,452,000		91.8			905,794,000		81			133.5
	Out-of-area time, under $100,000		3,150,000		0.2			4,078,000		0.4			(22.8	)
	Out-of-area time, $100,000 and over		184,659,000		8			209,039,000		18.6			(11.7	)
			187,809,000		8.2			213,117,000		19			(11.9	)
	Total deposits	$	2,303,261,000		100	%	$	1,118,911,000		100	%		105.8	%

Note_7_Securities_Sold_Under_A

Note 7 - Securities Sold Under Agreements to Repurchase	6 Months Ended
	Jun. 30, 2014
Disclosure Text Block [Abstract]	'
Repurchase Agreements, Resale Agreements, Securities Borrowed, and Securities Loaned Disclosure [Text Block]	'
	7.     SECURITIES SOLD UNDER AGREEMENTS TO REPURCHASE
	Securities sold under agreements to repurchase (“repurchase agreements”) are offered principally to certain large deposit customers. Information relating to our repurchase agreements follows:
		Six Months Ended			Twelve Months Ended
		30-Jun-14			31-Dec-13
	Outstanding balance at end of period	$	124,108,000		$	69,305,000
	Average interest rate at end of period		0.1	%		0.12	%
	Average daily balance during the period	$	79,003,000		$	65,939,000
	Average interest rate during the period		0.12	%		0.12	%
	Maximum daily balance during the period	$	126,621,000		$	78,960,000
	Repurchase agreements generally have original maturities of less than one year. Repurchase agreements are treated as financings and the obligations to repurchase securities sold are reflected as liabilities. Securities involved with the agreements are recorded as assets of our bank and are held in safekeeping by a correspondent bank. Repurchase agreements are secured by securities with an aggregate market value equal to the aggregate outstanding balance.

Note_8_Federal_Home_Loan_Bank_

Note 8 - Federal Home Loan Bank Advances	6 Months Ended
	Jun. 30, 2014
Disclosure Text Block [Abstract]	'
Federal Home Loan Bank Advances, Disclosure [Text Block]	'
	8.     FEDERAL HOME LOAN BANK ADVANCES
	Federal Home Loan Bank advances totaled $57.0 million at June 30, 2014, and mature at varying dates from October 2014 through September, 2017, with fixed rates of interest from 0.41% to 1.51% and averaging 1.21%. Federal Home Loan Bank advances totaled $45.0 million at December 31, 2013, maturing at varying dates from March 2017 through September 2017, with fixed rates of interest from 1.22% to 1.51% and averaging 1.34%. The $12.0 million increase during the first six months of 2014 reflects the consummation of the merger with Firstbank effective June 1, 2014.
	Each advance is payable at its maturity date and is subject to a prepayment fee if paid prior to the maturity date. The advances are collateralized by residential mortgage loans, first mortgage liens on multi-family residential property loans, first mortgage liens on commercial real estate property loans, and substantially all other assets of our bank, under a blanket lien arrangement. Our borrowing line of credit as of June 30, 2014 totaled about $570 million, with availability based on collateral approximating $509 million.
	Maturities of currently outstanding FHLB advances are as follows:
	2014	$	3,000,000
	2015		6,000,000
	2016		3,044,000
	2017		45,000,000
	2018		0

Note_9_Stockbased_Compensation

Note 9 - Stock-based Compensation	6 Months Ended
	Jun. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]	'
	9.     STOCK-BASED COMPENSATION
	Stock-based compensation plans are used to provide directors and employees with an increased incentive to contribute to our long-term performance and growth, to align the interests of directors and employees with the interests of our shareholders through the opportunity for increased stock ownership and to attract and retain directors and employees. From 2000 through 2005, stock option grants were provided to directors and certain employees through several stock option plans, including the 2000 Employee Stock Option Plan, 2004 Employee Stock Option Plan and Independent Director Stock Option Plan. During 2006, 2007 and 2008, stock option and restricted stock grants were provided to certain employees through the Stock Incentive Plan of 2006. No stock option or restricted stock grants were made during 2009, 2010 or 2011. During 2012, restricted stock grants were provided to directors and certain employees through the Stock Incentive Plan of 2006. No stock option or restricted stock grants were made during 2013 or during the first six months of 2014 due to the pending merger with Firstbank.
	Under our 2000 Employee Stock Option Plan and 2004 Employee Stock Option Plan, stock options granted to employees were granted at the market price on the date of grant, generally fully vested after one year and expired ten years from the date of grant. Stock options granted to non-executive officers during 2005 vested about three weeks after being granted. Under our Independent Director Stock Option Plan, stock options granted to non-employee directors are at 125% of the market price on the date of grant, fully vested after five years and expire ten years from the date of grant.
	The Stock Incentive Plan of 2006 replaced all of our outstanding stock option plans for stock options not previously granted. Under the Stock Incentive Plan of 2006, incentive awards may include, but are not limited to, stock options, restricted stock, stock appreciation rights and stock awards. Incentive awards that are stock options or stock appreciation rights are granted with an exercise price not less than the closing price of our common stock on the date of grant, or for stock options granted in 2006 or 2007, the day before the date of grant, if the closing price was higher on the day before the date of grant. Price, vesting and expiration date parameters are determined by Mercantile’s Compensation Committee on a grant-by-grant basis. Generally, the stock options granted to employees during 2006, 2007 and 2008 fully vested after two years and expire after seven years. The restricted stock awards granted to certain employees during 2006, 2007 and 2008 fully vested after four years, while the restricted stock awards granted to directors and certain employees during 2012 fully vest after two years. No payments were required from employees for the restricted stock awards. At year-end 2013, there were approximately 384,000 shares authorized for future incentive awards.
	In conjunction with the Firstbank merger, all of our outstanding restricted stock awards, which were schedule to cliff vest in full in November, 2014, became fully vested as of June 1, 2014, resulting in the recognition of compensation expense of $0.2 million in the second quarter of 2014 to reflect the accelerated vesting of the restricted stock awards. As of June 30, 2014, there was no unrecognized compensation cost related to unvested stock option grants under our various stock-based compensation plans, and no unrecognized compensation cost related to unvested restricted stock awards under our Stock Incentive Plan of 2006.
	Also in conjunction with the Firstbank merger, we assumed, and issued Mercantile stock options in replacement of, all outstanding stock option grants that had been issued to Firstbank employees under the Firstbank Corporation Stock Option and Restricted Stock Plan of 1997 and the Firstbank Corporation 2006 Stock Compensation Plan. In general, stock option grants for 50 shares or less fully vested after one year from date of grant, while stock option grants for more than 50 shares vested over a five-year period at 20% of the grant per annum starting one year from the date of grant. The stock option grants expire ten years from the date of grant. There were approximately 282,200 Mercantile stock options issued as a result of the merger, with about 258,400 of the stock option grants fully vested and exercisable, on the Merger Date. The remaining 23,800 stock options vest over the next six to 18 months. Unrecognized compensation cost related to the unvested stock options was less than $100,000 as of June 30, 2014, which is expected to be fully recognized by November, 2015.
	A summary of restricted stock activity from grants issued under the Mercantile plans during the first six months of 2014 and the 2013 and 2012 calendar years is as follows:
			2014						2013								2012
						Weighted							Weighted								Weighted
						Average							Average								Average
			Shares			Fair Value			Shares				Fair Value				Shares				Fair Value
	Nonvested at beginning of year			63,800		$	14.3			66,100			$	14.3				38,650			$	6.2
	Granted			0		NA				0			NA					66,100				14.3
	Vested			(63,300	)		14.3			0			NA					(38,266	)			6.2
	Forfeited			(500	)		14.3			(2,300	)			14.3				(384	)			6.2
	Nonvested at end of period			0		$	NA			63,800			$	14.3				66,100			$	14.3
	A summary of stock option activity from grants issued under the various Mercantile plans during the first six months of 2014 and the 2013 and 2012 calendar years is as follows:
			2014						2013								2012
						Weighted							Weighted								Weighted
						Average							Average								Average
						Exercise							Exercise								Exercise
			Shares			Price			Shares				Price				Shares				Price
	Outstanding at beginning of year			60,876		$	33.11			152,896			$	26.15				214,903			$	22.4
	Granted			0		NA				0			NA					0			NA
	Exercised			(2,845	)		17.74			(51,055	)			13.72				(50,930	)			10.83
	Forfeited or expired			(1,141	)		37.55			(40,965	)			31.3				(11,077	)			23.77
	Outstanding at end of period			56,890		$	33.79			60,876			$	33.11				152,896			$	26.15
	Options exercisable at period-end			56,890		$	33.79			60,876			$	33.11				152,896			$	26.15
	The fair value of each stock option award is estimated on the date of grant using a closed option valuation (Black-Scholes) model that uses the assumptions noted in the table below. Expected volatilities are based on historical volatilities on our common stock. Historical data is used to estimate stock option expense and post-vesting termination behavior. The expected term of stock options granted is based on historical data and represents the period of time that stock options granted are expected to be outstanding, which takes into account that the stock options are not transferable. The risk-free interest rate for the expected term of the stock option is based on the U.S. Treasury yield curve in effect at the time of the stock option grant. Except for the stock options awarded in connection with the merger, no stock option grants were made during 2012 or 2013 or during the first six months of 2014.
	Options issued under the various Mercantile plans outstanding at June 30, 2014 were as follows:
							Outstanding								Exercisable
									Weighted Average		Weighted								Weighted
	Range of								Remaining		Average								Average
	Exercise								Contractual		Exercise								Exercise
	Prices						Number		Life (years)		Price				Number				Price
		$6.21	-	$	8			2,700	1.4		$	6.21				2,700			$	6.21
		$32.01	-	$	36			51,300	0.9			34.87				51,300				34.87
		$40.01	-	$	44			2,890	0.3			40.28				2,890				40.28
		Outstanding at end of period						56,890	0.9		$	33.79				56,890			$	33.79
	Information related to options issued under the various Mercantile plans outstanding at June 30, 2014 and year-end 2013 and 2012 is as follows:
			2014			2013			2012
	Minimum exercise price		$	6.21		$	6.21		$	6.21
	Maximum exercise price			40.28			40.28			40.28
	Average remaining option term (years)			0.9			1.4			1.9
	Information related to stock option grants and exercises issued under the various Mercantile plans during the first six months of 2014 and the 2013 and 2012 calendar years is as follows:
			2014			2013			2012
	Aggregate intrinsic value of stock options exercised		$	11,000		$	408,000		$	307,000
	Cash received from stock option exercises			50,000			289,000			227,000
	Tax benefit realized from stock option exercises			0			0			0
	Weighted average per share fair value of stock options granted		NA			NA			NA
	The aggregate intrinsic value of all stock options issued under the various Mercantile plans outstanding and exercisable at June 30, 2014 was less than $0.1 million. Shares issued as a result of the exercise of stock option grants have been authorized and previously unissued shares.
	A summary of stock option activity from grants issued under the various former Firstbank plans that became part of Mercantile’s plans upon consummation of the merger during the month of June, 2014, is as follows:
						Weighted
						Average
						Exercise
			Shares			Price
	Outstanding at beginning of year			0		$	NA
	Granted			0			NA
	Assumed as part of merger			282,178			15.48
	Exercised			(3,075	)		7.8
	Forfeited or expired			0		NA
	Outstanding at end of period			279,103		$	15.57
	Options exercisable at period-end			255,373		$	16.44
Options issued under the various Firstbank plans outstanding at June 30, 2014 were as follows:
						Outstanding								Exercisable
								Weighted Average		Weighted								Weighted
Range of								Remaining		Average								Average
Exercise								Contractual		Exercise								Exercise
Prices						Number		Life (years)		Price				Number				Price
	$4.00	-	$	8.00			78,855	5.4		$	6.54				62,215			$	6.9
	$8.01	-	$	12			31,830	5.4			8.6				24,740				8.6
	$12.01	-	$	16			46,000	3.4			16				46,000				16
	$20.01	-	$	24			85,962	1.9			22.43				85,962				22.43
	$24.01	-	$	28			36,456	0.4			24.46				36,456				24.46
Outstanding at end of period							279,103	3.3		$	15.57				255,373			$	16.44
Information related to options issued under the various Firstbank plans outstanding at June 30, 2014 is as follows:
Minimum exercise price		$	7.8
Maximum exercise price			24.46
Average remaining option term (in years)		3.3
Information related to stock option grants and exercises issued under the various Firstbank plans during the month of June, 2014, is as follows:
Aggregate intrinsic value of stock options exercised		$	40,000
Cash received from stock option exercises			24,000
Tax benefit realized from stock option exercises			0
Weighted average per share fair value of stock options granted		NA
The aggregate intrinsic value of all stock options issued under the various Firstbank plans outstanding and exercisable at June 30, 2014 was $2.1 million.
On June 26, 2014, we granted a total of 7,375 shares of common stock to our Corporate, Bank and Regional Advisory Boards of Directors for retainer payments for the period of July 1, 2014 through December 31, 2014. The associated $155,000 cost will be expensed on a straightline basis over the last six months of 2014.

Note_10_Commitments_and_OffBal

Note 10 - Commitments and Off-Balance Sheet Risk	6 Months Ended
	Jun. 30, 2014
Disclosure Text Block Supplement [Abstract]	'
Commitments Contingencies and Guarantees [Text Block]	'
	10.   COMMITMENTS AND OFF-BALANCE SHEET RISK
	Our bank is a party to financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include commitments to extend credit and standby letters of credit. Loan commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Standby letters of credit are conditional commitments issued by our bank to guarantee the performance of a customer to a third party. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements.
	These instruments involve, to varying degrees, elements of credit risk in excess of the amount recognized, if any, in the balance sheet. Our bank’s maximum exposure to loan loss in the event of nonperformance by the other party to the financial instrument for commitments to extend credit and standby letters of credit is represented by the contractual notional amount of those instruments. Our bank uses the same credit policies in making commitments and conditional obligations as it does for on-balance sheet instruments. Collateral, such as accounts receivable, securities, inventory, and property and equipment, is generally obtained based on our credit assessment of the borrower. If required, estimated loss exposure resulting from these instruments is expensed and is generally recorded as a liability. There was no reserve or liability balance for these instruments as of June 30, 2014 and December 31, 2013.
	A summary of the contractual amounts of our financial instruments with off-balance sheet risk at June 30, 2014 and December 31, 2013 follows:
		June 30,		December 31,
		2014		2013
	Commercial unused lines of credit	$	339,146,000	$	257,937,000
	Unused lines of credit secured by 1 – 4 family residential properties		60,439,000		23,429,000
	Credit card unused lines of credit		9,180,000		9,013,000
	Other consumer unused lines of credit		9,302,000		5,695,000
	Commitments to make loans		177,363,000		58,799,000
	Standby letters of credit		37,598,000		19,670,000
		$	633,028,000	$	374,543,000
	Certain of our commercial loan customers have entered into interest rate swap agreements directly with our correspondent banks. To assist our commercial loan customers in these transactions, and to encourage our correspondent banks to enter into the interest rate swap transactions with minimal credit underwriting analyses on their part, we have entered into risk participation agreements with the correspondent banks whereby we agree to make payments to the correspondent banks owed by our commercial loan customers under the interest rate swap agreement in the event that our commercial loan customers do not make the payments. We are not a party to the interest rate swap agreements under these arrangements. As of June 30, 2014, the total notional amount of the underlying interest rate swap agreements was $17.6 million, with a net fair value from our commercial loan customers’ perspective of negative $2.6 million. These risk participation agreements are considered financial guarantees in accordance with applicable accounting guidance and are therefore recorded as liabilities at fair value, generally equal to the fees collected at the time of their execution. These liabilities are accreted into income during the term of the interest rate swap agreements, generally ranging from four to fifteen years.

Note_11_Hedging_Activities

Note 11 - Hedging Activities	6 Months Ended
	Jun. 30, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Derivative Instruments and Hedging Activities Disclosure [Text Block]	'
	11.   HEDGING ACTIVITIES
	Our interest rate risk policy includes guidelines for measuring and monitoring interest rate risk. Within these guidelines, parameters have been established for maximum fluctuations in net interest income. Possible fluctuations are measured and monitored using net interest income simulation. Our policy provides for the use of certain derivative instruments and hedging activities to aid in managing interest rate risk to within the policy parameters. To help mitigate the negative impact to our net interest income in an increasing interest rate environment resulting from our cost of funds likely increasing at a higher rate than the yield on our assets, we may periodically enter into derivative financial instruments.
	In February 2012, we entered into an interest rate swap agreement with a correspondent bank to hedge the floating rate on our subordinated debentures, which became effective in January 2013 and matures in January 2018. Our $32.0 million of subordinated debentures have a rate equal to the 90-Day Libor Rate plus a fixed spread of 218 basis points, and are subject to repricing quarterly. The interest rate swap agreement provides for us to pay our correspondent bank a fixed rate, while our correspondent bank will pay us the 90-Day Libor Rate on a $32.0 million notional amount. The quarterly re-set dates for the floating rate on the interest rate swap agreement are the same as the re-set dates for the floating rate on the subordinated debentures. The interest rate swap agreement does qualify for hedge accounting; therefore, monthly fluctuations in the present value of the interest rate swap agreement, net of tax effect, are recorded to other comprehensive income. As of June 30, 2014 and December 31, 2013, the present value of the interest rate swap agreement was recorded as a liability in the amount of $0.4 million and $0.3 million, respectively.

Note_12_Fair_Values_of_Financi

Note 12 - Fair Values of Financial Instruments	6 Months Ended
	Jun. 30, 2014
Fair Value Disclosures [Abstract]	'
Fair Value Disclosures [Text Block]	'
	12.   FAIR VALUES OF FINANCIAL INSTRUMENTS
	The carrying amounts, estimated fair values and level within the fair value hierarchy of financial instruments were as follows as of June 30, 2014 and December 31, 2013 (dollars in thousands):
		Level in		30-Jun-14				31-Dec-13
		Fair Value		Carrying		Fair		Carrying		Fair
		Hierarchy		Values		Values		Values		Values
	Financial assets:
	Cash	Level 1		$	14,040	$	14,040	$	1,464	$	1,464
	Cash equivalents	Level 2			104,813		104,813		145,501		145,501
	Securities available for sale		-1		475,275		475,275		131,178		131,178
	FHLB stock		-2		19,226		19,226		11,961		11,961
	Loans, net	Level 3			2,052,626		2,049,625		1,030,422		1,027,300
	Bank owned life insurance	Level 2			55,693		55,693		51,377		51,377
	Accrued interest receivable	Level 2			7,711		7,711		3,649		3,649
	Financial liabilities:
	Deposits	Level 2			2,303,261		2,305,253		1,118,911		1,120,576
	Repurchase agreements	Level 2			124,108		124,108		69,305		69,305
	FHLB advances	Level 2			57,044		57,235		45,000		45,139
	Subordinated debentures	Level 2			54,131		54,087		32,990		32,974
	Accrued interest payable	Level 2			2,159		2,159		2,041		2,041
	Interest rate swap		-1		390		390		264		264
	(1)   See Note 13 for a description of the fair value hierarchy as well as a disclosure of levels for classes of financial assets and liabilities.
	(2)   It is not practical to determine the fair value of FHLB stock due to transferability restrictions.
	Carrying amount is the estimated fair value for cash and cash equivalents, accrued interest receivable and payable, bank owned life insurance, noninterest checking deposits, securities sold under agreements to repurchase, and variable rate loans and deposits that reprice frequently and fully. Security fair values are based on market prices or dealer quotes, and if no such information is available, on the rate and term of the security and information about the issuer. For fixed rate loans and deposits and for variable rate loans and deposits with infrequent repricing or repricing limits, fair value is based on discounted cash flows using current market rates applied to the estimated life and credit risk. Fair value of subordinated debentures and Federal Home Loan Bank advances is based on current rates for similar financing. Fair value of the interest rate swap is determined primarily utilizing market-consensus forecasted yield curves. Fair value of off-balance sheet items is estimated to be nominal.

Note_13_Fair_Values

Note 13 - Fair Values	6 Months Ended
	Jun. 30, 2014
Disclosure Text Block [Abstract]	'
Fair Value, Measurement Inputs, Disclosure [Text Block]	'
	13.   FAIR VALUES
	Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. A fair value measurement assumes that the transaction to sell the asset or transfer the liability occurs in the principal market for the asset or liability, or in the absence of a principal market, the most advantageous market for the asset or liability. The price of the principal (or most advantageous) market used to measure the fair value of the asset or liability is not adjusted for transaction costs. An orderly transaction is a transaction that assumes exposure to the market for a period prior to the measurement date to allow for marketing activities that are usual and customary for transactions involving such assets and liabilities; it is not a forced transaction. Market participants are buyers and sellers in the principal market that are (i) independent, (ii) knowledgeable, (iii) able to transact and (iv) willing to transact.
	We are required to use valuation techniques that are consistent with the market approach, the income approach and/or the cost approach. The market approach uses prices and other relevant information generated by market transactions involving identical or comparable assets and liabilities. The income approach uses valuation techniques to convert future amounts, such as cash flows or earnings, to a single present amount on a discounted basis. The cost approach is based on the amount that currently would be required to replace the service capacity of an asset (replacement cost). Valuation techniques should be consistently applied. Inputs to valuation techniques refer to the assumptions that market participants would use in pricing the asset or liability. Inputs may be observable, meaning those that reflect the assumptions market participants would use in pricing the asset or liability based on market data obtained from independent sources, or unobservable, meaning those that reflect our own assumptions about the assumptions market participants would use in pricing the asset or liability based on the best information available in the circumstances. In that regard, we utilize a fair value hierarchy for valuation inputs that gives the highest priority to quoted prices in active markets for identical assets or liabilities and the lowest priority to unobservable inputs. The fair value hierarchy is as follows:
	Level 1: Quoted prices (unadjusted) for identical assets or liabilities in active markets that we have the ability to access as of the measurement date.
	Level 2: Significant other observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities in active markets; quoted prices for identical or similar assets or liabilities in markets that are not active; or other inputs that are observable or can be derived from or corroborated by observable market data by correlation or other means.
	Level 3: Significant unobservable inputs that reflect our own conclusions about the assumptions that market participants would use in pricing an asset or liability.
	The following is a description of our valuation methodologies used to measure and disclose the fair values of our financial assets and liabilities that are recorded at fair value on a recurring or nonrecurring basis:
	Securities available for sale. Securities available for sale are recorded at fair value on a recurring basis. Fair value measurement is based on quoted prices, if available. If quoted prices are not available, fair values are measured using independent pricing models. Level 2 securities include U.S. Government agency bonds, mortgage-backed securities issued or guaranteed by U.S. Government agencies, municipal general obligation and revenue bonds and mutual funds. Level 3 securities include bonds issued by certain relatively small municipalities located within our markets that have very limited marketability due to their size and lack of ratings from a recognized rating service. We carry these bonds at historical cost, which we believe approximates fair value, unless our periodic financial analysis or other information becomes known which necessitates a valuation allowance. There was no such valuation allowance as of June 30, 2014 or December 31, 2013. We have no Level 1 securities available for sale.
	Derivatives. The interest rate swap is measured at fair value on a recurring basis. We measure fair value utilizing models that use primarily market observable inputs, such as forecasted yield curves, and accordingly, the interest rate swap agreement is classified as Level 2.
	Mortgage loans held for sale. Mortgage loans held for sale are carried at the lower of aggregate cost or fair value and are measured on a nonrecurring basis. Fair value is based on independent quoted market prices, where applicable, or the prices for other mortgage whole loans with similar characteristics. As of June 30, 2014 and December 31, 2013, we determined that the fair value of our mortgage loans held for sale approximated the recorded cost of $1.9 million and $1.1 million, respectively.
	Loans. We do not record loans at fair value on a recurring basis. However, from time to time, we record nonrecurring fair value adjustments to collateral dependent loans to reflect partial write-downs or specific reserves that are based on the observable market price or current estimated value of the collateral. These loans are reported in the nonrecurring table below at initial recognition of impairment and on an ongoing basis until recovery or charge-off.
	Foreclosed Assets. At time of foreclosure or repossession, foreclosed and repossessed assets are adjusted to fair value less costs to sell upon transfer of the loans to foreclosed and repossessed assets, establishing a new cost basis. We subsequently adjust estimated fair value of foreclosed assets on a nonrecurring basis to reflect write-downs based on revised fair value estimates.
	Assets and Liabilities Measured at Fair Value on a Recurring Basis
	The balances of assets and liabilities measured at fair value on a recurring basis as of June 30, 2014 are as follows:
					Quoted
					Prices in
					Active		Significant
					Markets for		Other			Significant
					Identical		Observable			Unobservable
					Assets		Inputs			Inputs
			Total		(Level 1)		(Level 2)			(Level 3)
	Available for sale securities
	U.S. Government agency debt obligations	$	213,706,000		$	0	$	213,706,000		$	0
	Mortgage-backed securities		108,172,000			0		108,172,000			0
	Municipal general obligation bonds		140,169,000			0		128,791,000			11,378,000
	Municipal revenue bonds		11,324,000			0		11,324,000			0
	Other investments		1,904,000			0		1,904,000			0
	Interest rate swap		(390,000	)		0		(390,000	)		0
	Total	$	474,885,000		$	0	$	463,507,000		$	11,378,000
	There were no transfers in or out of Level 1, Level 2 or Level 3 during the first six months of 2014.
	The balances of assets and liabilities measured at fair value on a recurring basis as of December 31, 2013 are as follows:
					Quoted
					Prices in
					Active		Significant
					Markets for		Other			Significant
					Identical		Observable			Unobservable
					Assets		Inputs			Inputs
		Total			(Level 1)		(Level 2)			(Level 3)
	Available for sale securities
	U.S. Government agency debt obligations	$	98,477,000		$	0	$	98,477,000		$	0
	Mortgage-backed securities		13,558,000			0		13,558,000			0
	Municipal general obligation bonds		16,872,000			0		16,872,000			0
	Municipal revenue bonds		916,000			0		916,000			0
	Other investments		1,355,000			0		1,355,000			0
	Interest rate swap		(264,000	)		0		(264,000	)		0
	Total	$	130,914,000		$	0	$	130,914,000		$	0
	There were no transfers in or out of Level 1, Level 2 or Level 3 during 2013.
	Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis
	The balances of assets and liabilities measured at fair value on a nonrecurring basis as of June 30, 2014 are as follows:
					Quoted
					Prices in
					Active		Significant
					Markets for		Other			Significant
					Identical		Observable			Unobservable
					Assets		Inputs			Inputs
		Total			(Level 1)		(Level 2)			(Level 3)
	Impaired loans (1)	$	18,899,000		$	0	$	0		$	18,899,000
	Foreclosed assets (1)		2,878,000			0		0			2,878,000
	Total	$	21,777,000		$	0	$	0		$	21,777,000
	The balances of assets and liabilities measured at fair value on a nonrecurring basis as of December 31, 2013 are as follows:
					Quoted
					Prices in
					Active		Significant
				Markets for		Other			Significant
				Identical		Observable			Unobservable
				Assets		Inputs			Inputs
	Total			(Level 1)		(Level 2)			(Level 3)
Impaired loans (1)	$	23,405,000		$	0	$	0		$	23,405,000
Foreclosed assets (1)		2,851,000			0		0			2,851,000
Total	$	26,256,000		$	0	$	0		$	26,256,000
(1)   Represents carrying value and related write-downs for which adjustments are based on the estimated value of the property or other assets.

Note_14_Regulatory_Matters

Note 14 - Regulatory Matters	6 Months Ended
	Jun. 30, 2014
Disclosure Text Block [Abstract]	'
Regulatory Capital Requirements under Banking Regulations [Text Block]	'
	14.   REGULATORY MATTERS
	We are subject to regulatory capital requirements administered by federal banking agencies. Capital adequacy guidelines and prompt corrective action regulations involve quantitative measures of assets, liabilities, and certain off-balance sheet items calculated under regulatory accounting practices. Capital amounts and classifications are also subject to qualitative judgments by regulators about components, risk weightings, and other factors, and the regulators can lower classifications in certain cases. Failure to meet various capital requirements can initiate regulatory action that could have a direct material effect on our financial statements.
	The prompt corrective action regulations provide five classifications, including well capitalized, adequately capitalized, undercapitalized, significantly undercapitalized, and critically undercapitalized, although these terms are not used to represent overall financial condition. If an institution is not well capitalized, regulatory approval is required to accept brokered deposits. Subject to limited exceptions, no institution may make a capital distribution if, after making the distribution, it would be undercapitalized. If an institution is undercapitalized, it is subject to close monitoring by its principal federal regulator, its asset growth and expansion are restricted, and plans for capital restoration are required. In addition, further specific types of restrictions may be imposed on the institution at the discretion of the federal regulator. At June 30, 2014 and December 31, 2013, our bank was in the well capitalized category under the regulatory framework for prompt corrective action. There are no conditions or events since June 30, 2014 that we believe have changed our bank’s categorization. Our actual capital levels (dollars in thousands) and the minimum levels required to be categorized as adequately and well capitalized were:
												Minimum Required
												to be Well
							Minimum Required					Capitalized Under
							for Capital					Prompt Corrective
		Actual					Adequacy Purposes					Action Regulations
		Amount		Ratio			Amount		Ratio			Amount		Ratio
	30-Jun-14
	Total capital (to risk weighted assets)
	Consolidated	$	323,221		14	%	$	184,700		8	%	$	NA	NA
	Bank		318,888		13.7			185,762		8			232,203		10	%
	Tier 1 capital (to risk weighted assets)
	Consolidated		302,365		13.1			92,350		4		NA		NA
	Bank		298,032		12.8			92,881		4			139,322		6
	Tier 1 capital (to average assets)
	Consolidated		302,365		16.7			72,553		4		NA		NA
	Bank		298,032		16.4			72,810		4			91,012		5
	31-Dec-13
	Total capital (to risk weighted assets)
	Consolidated	$	193,925		15.9	%	$	97,498		8	%	$	NA	NA
	Bank		190,493		15.7			97,329		8			121,662		10	%
	Tier 1 capital (to risk weighted assets)
	Consolidated		178,598		14.7			48,749		4		NA		NA
	Bank		175,192		14.4			48,665		4			72,997		6
	Tier 1 capital (to average assets)
	Consolidated		178,598		12.5			57,006		4			NA	NA
	Bank		175,192		12.3			56,860		4			71,075		5
	Our consolidated capital levels as of June 30, 2014 and December 31, 2013 include $52.1 million and $32.0 million, respectively, of trust preferred securities subject to certain limitations. Under applicable Federal Reserve guidelines, the trust preferred securities constitute a restricted core capital element. The guidelines provide that the aggregate amount of restricted core elements that may be included in our Tier 1 capital must not exceed 25% of the sum of all core capital elements, including restricted core capital elements, net of goodwill less any associated deferred tax liability. Our ability to include the trust preferred securities in Tier 1 capital in accordance with the guidelines is not affected by the provision of the Dodd-Frank Act generally restricting such treatment, because (i) the trust preferred securities were issued before May 19, 2010, and (ii) our total consolidated assets as of December 31, 2009 were less than $15.0 billion. As of June 30, 2014 and December 31, 2013, all $52.1 million and $32.0 million, respectively, of the trust preferred securities were included in our consolidated Tier 1 capital.
	Our and our bank’s ability to pay cash and stock dividends is subject to limitations under various laws and regulations and to prudent and sound banking practices. On January 16, 2014, our Board of Directors declared a cash dividend on our common stock in the amount of $0.12 per share that was paid on March 10, 2014 to shareholders of record as of February 10, 2014. On May 9, 2014, our Board of Directors declared a cash dividend on our common stock in the amount of $0.12 per share that was paid on June 25, 2014 to shareholders of record as of June 13, 2014. On July 17, 2014, our Board of Directors declared a cash dividend on our common stock in the amount of $0.12 per share that will be paid on September 24, 2014 to shareholders of record as of September 12, 2014. In addition, on May 9, 2014, our Board of Directors declared a special cash dividend on our common stock in the amount of $2.00 per share that was paid on May 29, 2014 to shareholders of record as of May 22, 2014. The special cash dividend, in contemplation of the plan of merger with Firstbank, was paid to Mercantile shareholders prior to the effective date of the merger with Firstbank and before the issuance of Mercantile shares in exchange for Firstbank shares.

Accounting_Policies_by_Policy_

Accounting Policies, by Policy (Policies)	6 Months Ended
	Jun. 30, 2014
Accounting Policies [Abstract]	'
Basis of Accounting, Policy [Policy Text Block]	'
	Basis of Presentation: The unaudited financial statements for the six months ended June 30, 2014 include the consolidated results of operations of Mercantile Bank Corporation and its consolidated subsidiaries. These subsidiaries include Mercantile Bank of Michigan (“our bank”) and our bank’s two subsidiaries, Mercantile Bank Real Estate Co., LLC (“our real estate company”) and Mercantile Insurance Center, Inc. (“our insurance center”). These consolidated financial statements have been prepared in accordance with the instructions for Form 10-Q and Item 303(b) of Regulation S-K and do not include all disclosures required by accounting principles generally accepted in the United States of America for a complete presentation of our financial condition and results of operations. In the opinion of management, the information reflects all adjustments (consisting only of normal recurring adjustments) which are necessary in order to make the financial statements not misleading and for a fair presentation of the results of operations for such periods. The results for the period ended June 30, 2014 should not be considered as indicative of results for a full year. For further information, refer to the consolidated financial statements and footnotes included in our annual report on Form 10-K for the year ended December 31, 2013.
	We have five separate business trusts that were formed to issue trust preferred securities. Subordinated debentures were issued to the trusts in return for the proceeds raised from the issuance of the trust preferred securities. The trusts are not consolidated, but instead we report the subordinated debentures issued to the trusts as a liability.
Earnings Per Share, Policy [Policy Text Block]	'
	Earnings Per Share: Basic earnings per share is based on the weighted average number of common shares and participating securities outstanding during the period. Diluted earnings per share include the dilutive effect of additional potential common shares issuable under our stock-based compensation plans and are determined using the treasury stock method. Our unvested restricted shares, which contain non-forfeitable rights to dividends whether paid or accrued (i.e., participating securities), are included in the number of shares outstanding for both basic and diluted earnings per share calculations. In the event of a net loss, our unvested restricted shares are excluded from the calculation of both basic and diluted earnings per share.
	Stock options for approximately 159,000 shares of common stock were included in determining diluted earnings per share for the three and six months ended June 30, 2014. Stock options for approximately 177,000 shares of common stock were antidilutive and not included in determining diluted earnings per share for the three and six months ended June 30, 2014.
	Approximately 64,000 unvested restricted shares were included in determining both basic and diluted earnings per share for the three and six months ended June 30, 2013. In addition, stock options for approximately 21,000 shares of common stock were included in determining diluted earnings per share for the three and six months ended June 30, 2013. Stock options for approximately 132,000 shares of common stock were antidilutive and not included in determining diluted earnings per share for the three and six months ended June 30, 2013.
Finance, Loan and Lease Receivables, Held-for-investment, Policy [Policy Text Block]	'
	Loans: Loans that we have the intent and ability to hold for the foreseeable future or until maturity or payoff are reported at the principal balance outstanding, net of deferred loan fees and costs and an allowance for loan losses. Interest income is accrued on the unpaid principal balance. Loan origination fees, net of certain direct origination costs, are deferred and recognized in interest income using the level-yield method without anticipating prepayments.
	Interest income on commercial loans and mortgage loans is discontinued at the time the loan is 90 days delinquent unless the loan is well-secured and in process of collection. Consumer and credit card loans are typically charged-off no later than when they are 120 days past due. Past due status is based on the contractual terms of the loan. In all cases, loans are placed on nonaccrual or charged-off at an earlier date if collection of principal and interest is considered doubtful.
	All interest accrued but not received for loans placed on nonaccrual is reversed against interest income. Interest received on such loans is accounted for on the cash-basis or cost-recovery method, until qualifying for return to accrual. Loans are returned to accrual status when all the principal and interest amounts contractually due are brought current and future payments are reasonably assured.
Loans and Leases Receivable, Allowance for Loan Losses Policy [Policy Text Block]	'
	Allowance for Loan Losses: The allowance for loan losses (“allowance”) is a valuation allowance for probable incurred credit losses. Loan losses are charged against the allowance when we believe the uncollectability of a loan is confirmed. Subsequent recoveries, if any, are credited to the allowance. We estimate the allowance balance required using past loan loss experience, the nature and volume of the portfolio, information about specific borrower situations and estimated collateral values, economic conditions and other factors. Allocations of the allowance may be made for specific loans, but the entire allowance is available for any loan that, in our judgment, should be charged-off.
	A loan is considered to be impaired when, based on current information and events, it is probable we will be unable to collect the scheduled payments of principal and interest when due according to the contractual terms of the loan agreement. Factors considered in determining impairment include payment status, collateral value and the probability of collecting scheduled principal and interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. We determine the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including the length of delay, the reasons for delay, the borrower’s prior payment record and the amount of the shortfall in relation to the principal and interest owed. Impairment is measured on a loan-by-loan basis for commercial and construction loans by either the present value of expected future cash flows discounted at the loan’s effective interest rate, the loan’s obtainable market price or the fair value of collateral if the loan is collateral dependent. Large groups of smaller balance homogeneous loans are collectively evaluated for impairment.
Loans and Leases Receivable, Troubled Debt Restructuring Policy [Policy Text Block]	'
	Troubled Debt Restructurings: A loan is accounted for as a troubled debt restructuring if we, for economic or legal reasons, grant a concession to a borrower considered to be experiencing financial difficulties that we would not otherwise consider. A troubled debt restructuring may involve the receipt of assets from the debtor in partial or full satisfaction of the loan, or a modification of terms such as a reduction of the stated interest rate or balance of the loan, a reduction of accrued interest, an extension of the maturity date or renewal of the loan at a stated interest rate lower than the current market rate for a new loan with similar risk, or some combination of these concessions. Troubled debt restructurings can be in either accrual or nonaccrual status. Nonaccrual troubled debt restructurings are included in nonperforming loans. Accruing troubled debt restructurings are generally excluded from nonperforming loans as it is considered probable that all contractual principal and interest due under the restructured terms will be collected.
	In accordance with current accounting guidance, loans modified as troubled debt restructurings are, by definition, considered to be impaired loans. Impairment for these loans is measured on a loan-by-loan basis similar to other impaired loans as described above under “Allowance for Loan Losses.” Certain loans modified as troubled debt restructurings may have been previously measured for impairment under a general allowance methodology (i.e., pooling), thus at the time the loan is modified as a troubled debt restructuring the allowance will be impacted by the difference between the results of these two measurement methodologies. Loans modified as troubled debt restructurings that subsequently default are factored into the determination of the allowance in the same manner as other defaulted loans.
Marketable Securities, Available-for-sale Securities, Policy [Policy Text Block]	'
	Investments: Investments are presented at fair value as required by accounting principles. Our investment portfolio is classified as available for sale, as such: adjustments to the fair value are reported as a change in equity. If a security is deemed to be other than temporarily impaired, the adjustment to fair value is recorded through the income statement.
	Securities available for sale consist of bonds and notes which might be sold prior to maturity due to changes in interest rates, prepayment risks, yield and availability of alternative investments, liquidity needs or other factors. Securities classified as available for sale are reported at their fair value and the related unrealized holding gain or loss (the difference between the fair value and amortized cost of the securities so classified) is reported in other comprehensive income. Other securities such as Federal Home Loan Bank stock are carried at cost. Interest income includes amortization of purchase premium or accretion of purchase discount. Premiums and discounts on securities are amortized or accreted on the level-yield method. Gains and losses on sales are recorded on the trade date and are determined using the specific identification method.
	Declines in the fair value of securities below their cost that are other than temporary are reflected as realized losses. In estimating other-than-temporary losses, management considers: (1) the length of time and extent that fair value has been less than carrying value; (2) the financial condition and near-term prospects of the issuer; and (3) the Company’s ability and intent to hold the security for a period of time sufficient to allow for any anticipated recovery in fair value.
Finance, Loan and Lease Receivables, Held-for-sale, Policy [Policy Text Block]	'
	Loans Held for Sale: Mortgage loans originated and intended for sale in the secondary market are carried at the lower of aggregate cost or market, as determined by outstanding commitments from investors. Net unrealized losses, if any, are recorded as a valuation allowance and charged to earnings. As of June 30, 2014 and December 31, 2013, we determined that the fair value of our mortgage loans held for sale approximated the recorded cost of $1.9 million and $1.1 million, respectively.
	Mortgage loans held for sale are generally sold with servicing rights retained. Gains and losses on sales of mortgage loans are based on the difference between the selling price and the carrying value of the related loan sold, which is reduced by the cost allocated to the servicing right. We generally lock in the sale price to the purchaser of the loan at the same time we make a rate commitment to the borrower. These mortgage banking activities are not designated as hedges and are carried at fair value. The net gain or loss on mortgage banking derivatives is included in the gain on sale of loans. Mortgage loans serviced for others totaled $593.0 million as of June 30, 2014.
Loans and Leases Receivable, Mortgage Banking Activities, Policy [Policy Text Block]	'
	Mortgage Banking Activities: Servicing rights are recognized as assets based on the allocated fair value of retained servicing rights on loans sold. Servicing rights are carried at the lower of amortized cost or fair value and are expensed in proportion to, and over the period of, estimated net servicing income. Impairment is evaluated quarterly based on the fair value of the servicing rights, using groupings of the underlying loans as to interest rates, types of loans, loan size, term and other factors. Any temporary impairment of a grouping is reported as a valuation allowance which is recovered when impairment no longer exists. Other-than-temporary impairments are recorded as a direct write-down to the carrying value of the servicing assets.
	Servicing fee income is recorded for fees earned for servicing loans. The fees are based on a contractual percentage of the outstanding principal or a fixed amount per loan and are recorded as income when earned. Amortization of mortgage servicing rights is netted against loan servicing income in the income statement.
Derivatives, Policy [Policy Text Block]	'
	Derivatives: Derivative financial instruments are recognized as assets or liabilities at fair value. The accounting for changes in the fair value of derivatives depends on the use of the derivatives and whether the derivatives qualify for hedge accounting. Used as part of our asset and liability management to help manage interest rate risk, our derivatives have generally consisted of interest rate swap agreements that qualified for hedge accounting. In February 2012, we entered into an interest rate swap agreement that qualifies for hedge accounting. The current outstanding interest rate swap is discussed in more detail in Note 11. We do not use derivatives for trading purposes.
	Changes in the fair value of derivatives that are designated, for accounting purposes, as a hedge of the variability of cash flows to be received on various loans and are effective are reported in other comprehensive income. They are later reclassified into earnings in the same periods during which the hedged transaction affects earnings and are included in the line item in which the hedged cash flows are recorded. If hedge accounting does not apply, changes in the fair value of derivatives are recognized immediately in current earnings as interest income or expense.
	If designated as a hedge, we formally document the relationship between derivatives as hedged items, as well as the risk-management objective and the strategy for undertaking hedge transactions. This documentation includes linking cash flow hedges to specific assets and liabilities on the balance sheet. If designated as a hedge, we also formally assess, both at the hedge’s inception and on an ongoing basis, whether the derivative instruments that are used are highly effective in offsetting changes in cash flows of the hedged items. Ineffective hedge gains and losses are recognized immediately in current earnings as noninterest income or expense. We discontinue hedge accounting when we determine the derivative is no longer effective in offsetting changes in the cash flows of the hedged item, the derivative is settled or terminates, or treatment of the derivative as a hedge is no longer appropriate or intended.
Goodwill and Intangible Assets, Policy [Policy Text Block]	'
	Goodwill and Core Deposit Intangible: Goodwill results from business acquisitions and represents the excess of the purchase price over the fair value of acquired tangible assets and liabilities and identifiable intangible assets. Goodwill is assessed at least annually for impairment and any such impairment is recognized in the period identified. A more frequent assessment is performed if conditions in the market place or changes in the company’s organizational structure occur. We use a discounted income approach and a market valuation model, which compares the inherent value of our company to valuations of recent transactions in the market place to determine if our goodwill has been impaired.
	The core deposit intangible that arose from the Firstbank Corporation acquisition was initially measured at fair value and is being amortized into noninterest expense over a ten-year period using the sum-of-the-years-digits methodology.
New Accounting Pronouncements, Policy [Policy Text Block]	'
	Adoption of New Accounting Standards: In January of 2014, the FASB issued ASU 2014-04, Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans upon Foreclosure. This ASU clarifies that an in substance repossession or foreclosure occurs, and a creditor is considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan, upon either (1) the creditor obtaining legal title to the residential real estate property upon completion of a foreclosure or (2) the borrower conveying all interest in the residential real estate property to the creditor to satisfy that loan through completion of a deed in lieu of foreclosure or through a similar legal agreement. The ASU also requires additional related interim and annual disclosures. The guidance in this ASU is effective for annual and interim periods beginning after December 15, 2014. The adoption of this ASU is not expected to have a material effect on our financial position or results of operations.
	In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers. This ASU establishes a comprehensive revenue recognition standard for virtually all industries under U.S. GAAP, including those that previously followed industry-specific guidance such as the real estate, construction and software industries. The revenue standard’s core principle is built on the contract between a vendor and a customer for the provision of goods and services. It attempts to depict the exchange of rights and obligations between the parties in the pattern of revenue recognition based on the consideration to which the vendor is entitled. To accomplish this objective, the standard requires five basic steps: i) identify the contract with the customer, (ii) identify the performance obligations in the contract, (iii) determine the transaction price, (iv) allocate the transaction price to the performance obligations in the contract, and (v) recognize revenue when (or as) the entity satisfies a performance obligation. This ASU is effective for annual and interim periods beginning after December 15, 2016 with three transition methods available – full retrospective, retrospective and cumulative effect approach. Adoption of this ASU is not expected to have a material effect on our financial position or results of operations.
	In June 2014, the FASB issued ASU 2014-11, Repurchase-to-Maturity Transactions, Repurchase Financings, and Disclosures. This ASU requires two accounting changes. First, repurchase-to-maturity transactions will be accounted for as secured borrowing transactions on the balance sheet, rather than sales. Second, for repurchase financing arrangements, the ASU requires separate accounting for a transfer of a financial asset executed contemporaneously with (or in contemplation of) a repurchase agreement with the same counterparty, which also will generally result in secured borrowing accounting for the repurchase agreement. The ASU also introduces new disclosures to increase transparency about the types of collateral pledged for repurchase agreements, securities lending transactions, and repurchase-to-maturity transactions that are accounted for as secured borrowings. The ASU also requires a transferor to disclose information about transactions accounted for as a sale in which the transferor retains substantially all of the exposure to the economic return on the transferred financial assets through an agreement with the transferee. The accounting changes and disclosure for certain transactions accounted for as a sale are effective for the first interim or annual period beginning after December 15, 2014. The disclosure for transactions accounted for as secured borrowings is required for annual periods beginning after December 15, 2014, and for interim periods beginning after March 15, 2015. Adoption of this ASU is not expected to have a material effect on our financial position or results of operations.

Note_2_Business_Combination_Ta

Note 2 - Business Combination (Tables)	6 Months Ended
	Jun. 30, 2014
Business Combinations [Abstract]	'
Schedule of Business Acquisitions by Acquisition, Equity Interest Issued or Issuable [Table Text Block]	'
	Mercantile common shares issued for Firstbank common shares				8,087,272
	Price per share, based on Mercantile closing price on May 30, 2014			$	21.43
	Value of common stock issued				173,310,000
	Replacement stock options				1,664,000
	Total purchase price			$	174,974,000
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]	'
	Assets
	Cash and cash equivalents	$	91,806,000
	Securities		358,599,000
	Total loans		943,662,000
	Premises and equipment		24,049,000
	Core deposit intangible		17,478,000
	Mortgage servicing rights		7,389,000
	Other assets		8,500,000
	Total Assets	$	1,451,483,000
	Liabilities
	Deposits	$	1,229,609,000
	Borrowings		87,615,000
	Other liabilities		10,155,000
	Total Liabilities	$	1,327,379,000
	Net Identifiable Assets Acquired			$	124,104,000
	Goodwill			$	50,870,000
Business Acquisition, Pro Forma Information [Table Text Block]	'
		Three months ended June 30,				Six months ended June 30,
		2014		2013		2014		2013
	Net interest income	$	15,453,000	$	11,212,000	$	26,417,000	$	22,566,000
	Noninterest expense		17,160,000		13,407,000		26,862,000		22,786,000
	Net income		863,000		900,000		4,186,000		5,043,000
	Net income per diluted share		0.05		0.05		0.25		0.3
Business Acquisition, Fair Value of Loans Acquired [Table Text Block]	'
		Acquired		Acquired		Acquired
		Impaired		Non-Impaired		Total Loans
	Commercial Loans:
	Commercial & industrial	$	878,000	$	163,316,000	$	164,194,000
	Commercial real estate		12,973,000		378,016,000		390,989,000
	Construction & development		1,289,000		33,726,000		35,015,000
	Total Commercial Loans	$	15,140,000	$	575,058,000	$	590,198,000
	Consumer Loans:
	Residential mortgages	$	9,694,000	$	216,653,000	$	226,347,000
	Instalment		167,000		61,657,000		61,824,000
	Home equity lines		288,000		52,054,000		52,342,000
	Construction		76,000		12,875,000		12,951,000
	Total Consumer Loans	$	10,225,000	$	343,239,000	$	353,464,000
	Total Loans	$	25,365,000	$	918,297,000	$	943,662,000
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Table Text Block]	'
				Acquired
				Impaired
	Contractual required payments			$	44,936,000
	Nonaccretable difference				17,057,000
	Expected cash flows				27,879,000
	Accretable yield				2,514,000
	Carrying balance			$	25,365,000

Note_3_Securities_Tables

Note 3 - Securities (Tables)	6 Months Ended
	Jun. 30, 2014
Investments, Debt and Equity Securities [Abstract]	'
Available-for-sale Securities [Table Text Block]	'
				Gross			Gross
		Amortized		Unrealized			Unrealized			Fair
		Cost		Gains			Losses			Value
	30-Jun-14
	U.S. Government agency debt obligations	$	219,141,000	$	731,000		$	(6,166,000	)	$	213,706,000
	Mortgage-backed securities		107,145,000		1,249,000			(222,000	)		108,172,000
	Municipal general obligation bonds		139,996,000		894,000			(721,000	)		140,169,000
	Municipal revenue bonds		11,244,000		115,000			(35,000	)		11,324,000
	Other Investments		1,909,000		0			(5,000	)		1,904,000
		$	479,435,000	$	2,989,000		$	(7,149,000	)	$	475,275,000
	31-Dec-13
	U.S. Government agency debt obligations	$	108,279,000	$	263,000		$	(10,065,000	)	$	98,477,000
	Mortgage-backed securities		12,456,000		1,102,000			0			13,558,000
	Municipal general obligation bonds		16,488,000		388,000			(4,000	)		16,872,000
	Municipal revenue bonds		878,000		38,000			0			916,000
	Mutual funds		1,386,000		0			(31,000	)		1,355,000
		$	139,487,000	$	1,791,000		$	(10,100,000	)	$	131,178,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Table Text Block]	'
		Less than 12 Months					12 Months or More						Total
		Fair		Unrealized			Fair			Unrealized			Fair		Unrealized
		Value		Loss			Value			Loss			Value		Loss
	30-Jun-14
	U.S. Government agency debt obligations	$	90,627,000	$	(373,000	)	$	69,159,000		$	(5,793,000	)	$	159,786,000	$	(6,166,000	)
	Mortgage-backed securities		64,108,000		(222,000	)		0			0			64,108,000		(222,000	)
	Municipal general obligation bonds		92,461,000		(721,000	)		0			0			92,461,000		(721,000	)
	Municipal revenue bonds		7,775,000		(35,000	)		0			0			7,775,000		(35,000	)
	Other Investments		0		0			1,395,000			(5,000	)		1,395,000		(5,000	)
		$	254,971,000	$	(1,351,000	)	$	70,554,000		$	(5,798,000	)	$	325,525,000	$	(7,149,000	)
	31-Dec-13
	U.S. Government agency debt obligations	$	57,117,000	$	(5,798,000	)	$	29,679,000		$	(4,267,000	)	$	86,796,000	$	(10,065,000	)
	Mortgage-backed securities		0		0			0			0			0		0
	Municipal general obligation bonds		295,000		(4,000	)		0			0			295,000		(4,000	)
	Municipal revenue bonds		0		0			0			0			0		0
	Mutual funds		1,355,000		(31,000	)		0			0			1,355,000		(31,000	)
		$	58,767,000	$	(5,833,000	)	$	29,679,000		$	(4,267,000	)	$	88,446,000	$	(10,100,000	)
Investments Classified by Contractual Maturity Date [Table Text Block]	'
		Weighted
		Average		Amortized			Fair
		Yield		Cost			Value
	Due in 2014		0.86%	$	20,435,000		$	20,538,000
	Due in 2015 through 2019		1.25		178,246,000			182,962,000
	Due in 2020 through 2024		2.95		78,336,000			88,647,000
	Due in 2025 and beyond		3.63		89,198,000			73,052,000
	Mortgage-backed securities		1.73		103,209,000			108,172,000
	Other Investments		1.55		1,909,000			1,904,000
			2.07%	$	471,333,000		$	475,275,000

Note_4_Loans_and_Allowance_for1

Note 4 - Loans and Allowance for Loan Losses (Tables)	6 Months Ended
	Jun. 30, 2014
Note 4 - Loans and Allowance for Loan Losses (Tables) [Line Items]	'
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]	'
															Percent
		30-Jun-14						31-Dec-13							Increase
		Balance				%		Balance				%			(Decrease)
	Originated loans
	Commercial:
	Commercial and industrial	$	342,375,000			29.9	%	$	286,373,000			27.2	%			19.6	%
	Vacant land, land development, and residential construction		32,214,000			2.8			36,741,000			3.5				(12.3	)
	Real estate – owner occupied		264,596,000			23.1			261,877,000			24.9				1
	Real estate – non-owner occupied		399,855,000			34.9			364,066,000			34.6				9.8
	Real estate – multi-family and residential rental		37,569,000			3.3			37,639,000			3.5				(0.2	)
	Total commercial		1,076,609,000			94			986,696,000			93.7				9.1
	Retail:
	Home equity and other		35,151,000			3.1			35,080,000			3.3				0.2
	1-4 family mortgages		33,337,000			2.9			31,467,000			3				5.9
	Total retail		68,488,000			6			66,547,000			6.3				2.9
	Total originated loans	$	1,145,097,000			100	%	$	1,053,243,000			100	%			8.7	%
														Percent
		30-Jun-14						31-Dec-13						Increase
		Balance				%		Balance			%			(Decrease)
	Acquired loans
	Commercial:
	Commercial and industrial	$	273,684,000			29.5	%	$	0		NA			NM
	Vacant land, land development, and residential construction		21,091,000			2.3			0		NA			NM
	Real estate – owner occupied		119,818,000			12.9			0		NA			NM
	Real estate – non-owner occupied		149,434,000			16.1			0		NA			NM
	Real estate – multi-family and residential rental		47,099,000			5.1			0		NA			NM
	Total commercial		611,126,000			65.8			0		NA			NM
	Retail:
	Home equity and other		134,557,000			14.5			0		NA			NM
	1-4 family mortgages		182,702,000			19.7			0		NA			NM
	Total retail		317,259,000			34.2			0		NA			NM
	Total acquired loans	$	928,385,000			100	%	$	0		NA			NM
															Percent
		30-Jun-14						31-Dec-13							Increase
		Balance			%			Balance			%				(Decrease)
	Total loans
	Commercial:
	Commercial and industrial	$	616,059,000			29.7	%	$	286,373,000			27.2	%			115.1	%
	Vacant land, land development, and residential construction		53,305,000			2.6			36,741,000			3.5				45.1
	Real estate – owner occupied		384,414,000			18.5			261,877,000			24.9				46.8
	Real estate – non-owner occupied		549,289,000			26.5			364,066,000			34.6				50.9
	Real estate – multi-family and residential rental		84,668,000			4.1			37,639,000			3.5				124.9
	Total commercial		1,687,735,000			81.4			986,696,000			93.7				71
	Retail:
	Home equity and other		169,708,000			8.2			35,080,000			3.3				383.8
	1-4 family mortgages		216,039,000			10.4			31,467,000			3				586.6
	Total retail		385,747,000			18.6			66,547,000			6.3				479.7
	Total loans	$	2,073,482,000			100	%	$	1,053,243,000			100	%			96.9	%
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Accretable Yield Movement [Table Text Block]	'
	Balance at January 1, 2014	$	0
	Additions		2,514,000
	Accretion		(103,000	)
	Net reclassification from nonaccretable to accretable		0
	Disposals		0
	Ending balance	$	2,411,000
Schedule of Financing Receivables, Non Accrual Status [Table Text Block]	'
		June 30,			December 31,
		2014			2013
	Loans past due 90 days or more still accruing interest	$	0		$	0
	Nonaccrual loans		5,741,000			6,718,000
	Total nonperforming originated loans	$	5,741,000		$	6,718,000
Recorded Principal Balance of Nonaccrual Loans Including Troubled Debt Restructurings [Table Text Block]	'
		June 30,			December 31,
		2014			2013
	Commercial:
	Commercial and industrial	$	824,000		$	1,501,000
	Vacant land, land development, and residential construction		235,000			785,000
	Real estate – owner occupied		640,000			389,000
	Real estate – non-owner occupied		129,000			168,000
	Real estate – multi-family and residential rental		470,000			208,000
	Total commercial		2,298,000			3,051,000
	Retail:
	Home equity and other		772,000			788,000
	1-4 family mortgages		2,671,000			2,879,000
	Total retail		3,443,000			3,667,000
	Total nonaccrual loans	$	5,741,000		$	6,718,000
Past Due Financing Receivables [Table Text Block]	'
								Greater												Recorded
		30 – 59			60 – 89			Than 89												Balance > 89
		Days			Days			Days			Total							Total		Days and
		Past Due			Past Due			Past Due			Past Due				Current			Loans		Accruing
	Originated loans
	Commercial:
	Commercial and industrial	$	0		$	0		$	121,000		$	121,000			$	342,254,000		$	342,375,000	$	0
	Vacant land, land development, and residential construction		0			0			0			0				32,214,000			32,214,000		0
	Real estate – owner occupied		35,000			0			90,000			125,000				264,471,000			264,596,000		0
	Real estate – non-owner occupied		0			0			0			0				399,855,000			399,855,000		0
	Real estate – multi-family and residential rental		0			0			0			0				37,569,000			37,569,000		0
	Total commercial		35,000			0			211,000			246,000				1,076,363,000			1,076,609,000		0
	Retail:
	Home equity and other		2,000			0			0			2,000				35,149,000			35,151,000		0
	1-4 family mortgages		0			0			347,000			347,000				32,990,000			33,337,000		0
	Total retail		2,000			0			347,000			349,000				68,139,000			68,488,000		0
	Total past due loans	$	37,000		$	0		$	558,000		$	595,000			$	1,144,502,000		$	1,145,097,000	$	0
								Greater												Recorded
		30 – 59			60 – 89			Than 89												Balance > 89
		Days			Days			Days			Total							Total		Days and
		Past Due			Past Due			Past Due			Past Due				Current			Loans		Accruing
	Acquired loans
	Commercial:
	Commercial and  industrial	$	587,000		$	19,000		$	1,202,000		$	1,808,000			$	271,876,000		$	273,684,000	$	0
	Vacant land, land development, and residential construction		0			0			748,000			748,000				20,343,000			21,091,000		0
	Real estate – owner occupied		363,000			0			949,000			1,312,000				118,506,000			119,818,000		0
	Real estate – non-owner occupied		65,000			1,347,000			1,436,000			2,848,000				146,586,000			149,434,000		0
	Real estate – multi-family and residential rental		0			0			0			0				47,099,000			47,099,000		0
	Total commercial		1,015,000			1,366,000			4,335,000			6,716,000				604,410,000			611,126,000		0
	Retail:
	Home equity  and other		681,000			142,000			12,000			835,000				133,722,000			134,557,000		0
	1-4 family mortgages		1,796,000			115,000			860,000			2,771,000				179,931,000			182,702,000		0
	Total retail		2,477,000			257,000			872,000			3,606,000				313,653,000			317,259,000		0
	Total past due loans	$	3,492,000		$	1,623,000		$	5,207,000		$	10,322,000			$	918,063,000		$	928,385,000	$	0
								Greater												Recorded
		30 – 59			60 – 89			Than 89												Balance > 89
		Days			Days			Days			Total							Total		Days and
		Past Due			Past Due			Past Due			Past Due				Current			Loans		Accruing
	Originated loans
	Commercial:
	Commercial and industrial	$	0		$	0		$	309,000		$	309,000			$	286,064,000		$	286,373,000	$	0
	Vacant land, land development, and residential construction		0			0			0			0				36,741,000			36,741,000		0
	Real estate – owner occupied		65,000			0			50,000			115,000				261,762,000			261,877,000		0
	Real estate – non-owner occupied		0			0			0			0				364,066,000			364,066,000		0
	Real estate – multi-family and residential rental		0			0			64,000			64,000				37,575,000			37,639,000		0
	Total commercial		65,000			0			423,000			488,000				986,208,000			986,696,000		0
	Retail:
	Home equity and other		14,000			0			0			14,000				35,066,000			35,080,000		0
	1-4 family mortgages		21,000			44,000			375,000			440,000				31,027,000			31,467,000		0
	Total retail		35,000			44,000			375,000			454,000				66,093,000			66,547,000		0
	Total past due loans	$	100,000		$	44,000		$	798,000		$	942,000			$	1,052,301,000		$	1,053,243,000	$	0
Impaired Financing Receivables [Table Text Block]	'
											Second Quarter				Year-To-Date
		Unpaid									Average				Average
		Contractual			Recorded						Recorded				Recorded
		Principal			Principal			Related			Principal				Principal
		Balance			Balance			Allowance			Balance				Balance
	With no related allowance recorded
	Commercial:
	Commercial and industrial	$	1,620,000		$	132,000			-		$	169,000			$	283,000
	Vacant land, land development and residential construction		0			0						171,000				235,000
	Real estate – owner occupied		1,171,000			640,000						662,000				703,000
	Real estate – non-owner occupied		578,000			577,000						1,169,000				1,024,000
	Real estate – multi-family and residential rental		41,000			0						1,000				1,000
	Total commercial		3,410,000			1,349,000						2,172,000				2,246,000
	Retail:
	Home equity and other		707,000			644,000						647,000				585,000
	1-4 family mortgages		1,107,000			559,000						585,000				606,000
	Total retail		1,814,000			1,203,000						1,232,000				1,191,000
	Total with no related allowance recorded	$	5,224,000		$	2,552,000					$	3,404,000			$	3,437,000
											Second Quarter				Year-To-Date
		Unpaid									Average				Average
		Contractual			Recorded						Recorded				Recorded
		Principal			Principal			Related			Principal				Principal
		Balance			Balance			Allowance			Balance				Balance
	With an allowance recorded
	Commercial:
	Commercial and industrial	$	939,000		$	810,000		$	322,000		$	882,000			$	1,068,000
	Vacant land, land development and residential construction		3,614,000			3,300,000			351,000			3,604,000				3,782,000
	Real estate – owner occupied		2,460,000			2,460,000			679,000			1,974,000				1,820,000
	Real estate – non-owner occupied		17,753,000			17,731,000			7,414,000			18,591,000				19,418,000
	Real estate – multi-family and residential rental		1,677,000			1,549,000			674,000			1,319,000				1,774,000
	Total commercial		26,443,000			25,850,000			9,440,000			26,370,000				27,862,000
	Retail:
	Home equity and other		118,000			90,000			90,000			91,000				157,000
	1-4 family mortgages		2,220,000			2,112,000			832,000			2,136,000				2,168,000
	Total retail		2,338,000			2,202,000			922,000			2,227,000				2,325,000
	Total with an allowance recorded	$	28,781,000		$	28,052,000		$	10,362,000		$	28,597,000			$	30,187,000
	Total impaired loans:
	Commercial	$	29,853,000		$	27,199,000		$	9,440,000		$	28,542,000			$	30,108,000
	Retail		4,152,000			3,405,000			922,000			3,459,000				3,516,000
	Total impaired loans	$	34,005,000		$	30,604,000		$	10,362,000		$	32,001,000			$	33,624,000
											Second Quarter				Year-To-Date
		Unpaid									Average				Average
		Contractual			Recorded						Recorded				Recorded
		Principal			Principal			Related			Principal				Principal
		Balance			Balance			Allowance			Balance				Balance
	With no related allowance recorded
	Commercial:
	Commercial and industrial	$	2,793,000		$	1,277,000			-		$	1,416,000			$	1,483,000
	Vacant land, land development and residential construction		1,543,000			1,010,000						1,194,000				1,263,000
	Real estate – owner occupied		2,020,000			1,383,000						1,366,000				1,430,000
	Real estate – non-owner occupied		8,067,000			5,194,000						4,956,000				5,134,000
	Real estate – multi-family and residential rental		1,468,000			514,000						599,000				537,000
	Total commercial		15,891,000			9,378,000						9,531,000				9,847,000
	Retail:
	Home equity and other		508,000			468,000						474,000				477,000
	1-4 family mortgages		1,235,000			676,000						721,000				744,000
	Total retail		1,743,000			1,144,000						1,195,000				1,221,000
	Total with no related allowance recorded	$	17,634,000		$	10,522,000					$	10,726,000			$	11,068,000
											Second Quarter				Year-To-Date
		Unpaid									Average				Average
		Contractual			Recorded						Recorded				Recorded
		Principal			Principal			Related			Principal				Principal
		Balance			Balance			Allowance			Balance				Balance
With an allowance recorded
Commercial:
Commercial and industrial	$	1,708,000		$	1,587,000		$	1,154,000		$	2,046,000			$	2,006,000
Vacant land, land development and residential construction		5,058,000			4,515,000			1,223,000			2,998,000				2,738,000
Real estate – owner occupied		2,402,000			2,350,000			922,000			2,652,000				2,976,000
Real estate – non-owner occupied		29,249,000			29,233,000			9,672,000			29,778,000				30,840,000
Real estate – multi-family and residential rental		2,589,000			2,527,000			835,000			2,609,000				3,047,000
Total commercial		41,006,000			40,212,000			13,806,000			40,083,000				41,607,000
Retail:
Home equity and other		350,000			324,000			134,000			335,000				355,000
1-4 family mortgages		2,644,000			2,619,000			896,000			1,545,000				1,189,000
Total retail		2,994,000			2,943,000			1,030,000			1,880,000				1,544,000
Total with an allowance recorded	$	44,000,000		$	43,155,000		$	14,836,000		$	41,963,000			$	43,151,000
Total impaired loans:
Commercial	$	56,897,000		$	49,590,000		$	13,806,000		$	49,614,000			$	51,454,000
Retail		4,737,000			4,087,000			1,030,000			3,075,000				2,765,000
Total impaired loans	$	61,634,000		$	53,677,000		$	14,836,000		$	52,689,000			$	54,219,000
Financing Receivable Credit Quality Indicators [Table Text Block]	'
					Commercial										Commerical
					Vacant Land,			Commerical			Commercial				Real Estate -
		Commerical			Land Development,			Real Estate -			Real Estate -				Multi-Family
		and			and Residential			Owner			Non-Owner				and Residential
		Industrial			Construction			Occupied			Occupied				Rental
	Internal credit risk grade groupings:
	Grades 1 – 4	$	220,771,000		$	7,310,000		$	163,184,000		$	253,470,000			$	17,258,000
	Grades 5 – 7		120,587,000			21,604,000			97,802,000			132,604,000				18,745,000
	Grades 8 – 9		1,017,000			3,300,000			3,610,000			13,781,000				1,566,000
	Total commercial	$	342,375,000		$	32,214,000		$	264,596,000		$	399,855,000			$	37,569,000
					Commercial										Commerical
					Vacant Land,			Commerical			Commerical				Real Estate -
		Commercial			Land Development,			Real Estate -			Real Estate -				Multi-Family
		and			and Residential			Owner			Non-Owner				and Residential
		Industrial			Construction			Occupied			Occupied				Rental
	Internal credit risk grade groupings:
	Grades 1 – 4	$	111,223,000		$	4,240,000		$	28,670,000		$	44,344,000			$	19,438,000
	Grades 5 – 7		154,550,000			15,552,000			83,142,000			100,032,000				27,051,000
	Grades 8 – 9		7,911,000			1,299,000			8,006,000			5,058,000				610,000
	Total commercial	$	273,684,000		$	21,091,000		$	119,818,000		$	149,434,000			$	47,099,000
					Commerical										Commercial
					Vacant Land,			Commerical			Commercial				Real Estate -
		Commerical			Land Development,			Real Estate -			Real Estate				Multi-Family
		and			and Residential			Owner			Non-Owner				and Residential
		Industrial			Construction			Occupied			Occupied				Rental
	Internal credit risk grade groupings:
	Grades 1 – 4	$	208,151,000		$	6,973,000		$	156,230,000		$	219,325,000			$	15,465,000
	Grades 5 – 7		76,237,000			25,535,000			103,066,000			122,717,000				19,469,000
	Grades 8 – 9		1,985,000			4,233,000			2,581,000			22,024,000				2,705,000
	Total commercial	$	286,373,000		$	36,741,000		$	261,877,000		$	364,066,000			$	37,639,000
Allowance for Credit Losses on Financing Receivables [Table Text Block]	'
		Commercial			Retail
		Loans			Loans			Unallocated			Total
	Allowance for loan losses:
	Balance at March 31, 2014	$	19,001,000		$	1,957,000		$	(4,000	)	$	20,954,000
	Provision for loan losses		(334,000	)		(345,000	)		(21,000	)		(700,000	)
	Charge-offs		(98,000	)		(5,000	)		0			(103,000	)
	Recoveries		538,000			167,000			0			705,000
	Ending balance	$	19,107,000		$	1,774,000		$	(25,000	)	$	20,856,000
	Allowance for loan losses:
	Balance at December 31, 2013	$	20,455,000		$	2,358,000		$	8,000		$	22,821,000
	Provision for loan losses		(1,788,000	)		(779,000	)		(33,000	)		(2,600,000	)
	Charge-offs		(684,000	)		(7,000	)		0			(691,000	)
	Recoveries		1,124,000			202,000			0			1,326,000
	Ending balance	$	19,107,000		$	1,774,000		$	(25,000	)	$	20,856,000
	Ending balance: individually evaluated for impairment	$	9,440,000		$	922,000		$	0		$	10,362,000
	Ending balance: collectively evaluated for impairment	$	9,667,000		$	852,000		$	(25,000	)	$	10,494,000
	Total loans:
	Ending balance	$	1,076,609,000		$	68,488,000					$	1,145,097,000
	Ending balance: individually evaluated for impairment	$	27,199,000		$	3,405,000					$	30,604,000
	Ending balance: collectively evaluated for impairment	$	1,049,410,000		$	65,083,000					$	1,114,493,000
		Commercial			Retail
		Loans			Loans			Unallocated			Total
	Allowance for loan losses:
	Balance at March 31, 2013	$	23,717,000		$	2,302,000		$	16,000		$	26,035,000
	Provision for loan losses		(1,480,000	)		(10,000	)		(10,000	)		(1,500,000	)
	Charge-offs		(363,000	)		(19,000	)		0			(382,000	)
	Recoveries		508,000			286,000			0			794,000
	Ending balance	$	22,382,000		$	2,559,000		$	6,000		$	24,947,000
	Allowance for loan losses:
	Balance at December 31, 2012	$	26,043,000		$	2,645,000		$	(11,000	)	$	28,677,000
	Provision for loan losses		(2,644,000	)		(373,000	)		17,000			(3,000,000	)
	Charge-offs		(2,775,000	)		(22,000	)		0			(2,797,000	)
	Recoveries		1,758,000			309,000			0			2,067,000
	Ending balance	$	22,382,000		$	2,559,000		$	6,000		$	24,947,000
	Ending balance: individually evaluated for impairment	$	13,806,000		$	1,030,000		$	0		$	14,836,000
	Ending balance: collectively evaluated for impairment	$	8,576,000		$	1,529,000		$	6,000		$	10,111,000
	Total loans:
	Ending balance	$	985,616,000		$	73,046,000					$	1,058,662,000
	Ending balance: individually evaluated for impairment	$	49,590,000		$	4,087,000					$	53,677,000
	Ending balance: collectively ealuated for impairment	$	936,026,000		$	68,959,000					$	1,004,985,000
Troubled Debt Restructurings on Financing Receivables [Table Text Block]	'
					Pre-			Post-
					Modification			Modification
					Recorded			Recorded
		Number of			Principal			Principal
		Contracts			Balance			Balance
	Originated loans
	Commercial:
	Commercial and industrial		0		$	0		$	0
	Vacant land, land development and residential construction		0			0			0
	Real estate – owner occupied		1			996,000			996,000
	Real estate – non-owner occupied		0			0			0
	Real estate – multi-family and residential rental		0			0			0
	Total originated commercial		1			996,000			996,000
	Retail:
	Home equity and other		0			0			0
	1-4 family mortgages		0			0			0
	Total originated retail		0			0			0
	Total originated loans		1		$	996,000		$	996,000
	Acquired loans
	Commercial:
	Commercial and industrial		0		$	0		$	0
	Vacant land, land development and residential construction		0			0			0
	Real estate – owner occupied		0			0			0
	Real estate – non-owner occupied		0			0			0
	Real estate – multi-family and residential rental		0			0			0
	Total acquired commercial		0			0			0
	Retail:
	Home equity and other		0			0			0
	1-4 family mortgages		0			0			0
	Total acquired retail		0			0			0
	Total acquired loans		0		$	0		$	0
					Pre-			Post-
					Modification			Modification
					Recorded			Recorded
		Number of			Principal			Principal
		Contracts			Balance			Balance
	Total loans
	Commercial:
	Commercial and industrial		0		$	0		$	0
	Vacant land, land development and  residential construction		0			0			0
	Real estate – owner occupied		1			996,000			996,000
	Real estate – non-owner occupied		0			0			0
	Real estate – multi-family and  residential rental		0			0			0
	Total commercial		1			996,000			996,000
	Retail:
	Home equity and other		0			0			0
	1-4 family mortgages		0			0			0
	Total retail		0			0			0
	Total loans		1		$	996,000		$	996,000
					Pre-			Post-
					Modification			Modification
					Recorded			Recorded
		Number of			Principal			Principal
		Contracts			Balance			Balance
	Originated loans
	Commercial:
	Commercial and industrial		1		$	14,000		$	14,000
	Vacant land, land development and residential construction		0			0			0
	Real estate – owner occupied		1			996,000			996,000
	Real estate – non-owner occupied		1			146,000			146,000
	Real estate – multi-family and residential rental		0			0			0
	Total originated commercial		3			1,156,000			1,156,000
	Retail:
Home equity and other		0			0			0
1-4 family mortgages		0			0			0
Total originated retail		0			0			0
Total originated loans		3		$	1,156,000		$	1,156,000
				Pre-			Post-
				Modification			Modification
				Recorded			Recorded
	Number of			Principal			Principal
	Contracts			Balance			Balance
Acquired loans
Commercial:
Commercial and industrial		0		$	0		$	0
Vacant land, land development and residential construction		0			0			0
Real estate – owner occupied		0			0			0
Real estate – non-owner occupied		0			0			0
Real estate – multi-family and residential rental		0			0			0
Total acquired commercial		0			0			0
Retail:
Home equity and other		0			0			0
1-4 family mortgages		0			0			0
Total acquired		0			0			0
Total acquired loans		0		$	0		$	0
Total loans
Commercial:
Commercial and industrial		1		$	14,000		$	14,000
Vacant land, land development and residential construction		0			0			0
Real estate – owner occupied		1			996,000			996,000
Real estate – non-owner occupied		1			146,000			146,000
Real estate – multi-family and residential rental		0			0			0
Total commercial		3			1,156,000			1,156,000
Retail:
Home equity and other		0			0			0
1-4 family mortgages		0			0			0
Total retail		0			0			0
Total loans		3		$	1,156,000		$	1,156,000
				Pre-			Post-
				Modification			Modification
				Recorded			Recorded
	Number of			Principal			Principal
	Contracts			Balance			Balance
Originated loans
Commercial:
Commercial and industrial		1		$	60,000		$	60,000
Vacant land, land development and residential construction		2			3,247,000			3,247,000
Real estate – owner occupied		2			680,000			680,000
Real estate – non-owner occupied		0			0			0
Real estate – multi-family and residential rental		0			0			0
Total originated commercial		5			3,987,000			3,987,000
Retail:
Home equity and other		0			0			0
1-4 family mortgages		1			1,879,000			1,879,000
Total originated retail		1			1,879,000			1,879,000
Total originated loans		6		$	5,866,000		$	5,866,000
				Pre-			Post-
				Modification			Modification
				Recorded			Recorded
	Number of			Principal			Principal
	Contracts			Balance			Balance
Originated loans
Commercial:
Commercial and industrial		1		$	60,000		$	60,000
Vacant land, land development and residential construction		2			3,247,000			3,247,000
Real estate – owner occupied		3			904,000			904,000
Real estate – non-owner occupied		2			2,068,000			2,068,000
Real estate – multi-family and residential rental		0			0			0
Total originated commercial		8			6,279,000			6,279,000
Retail:
Home equity and other		0			0			0
1-4 family mortgages		1			1,879,000			1,879,000
Total originated retail		1			1,879,000			1,879,000
Total originated loans		9		$	8,158,000		$	8,158,000
Troubled Debt Restructurings on Financing Receivables WithIn Previous Twelve Months that Became Over Thirty Days Past Due [Table Text Block]	'
					Recprded
		Number of			Principal
		Contracts			Balance
	Commercial:
	Commercial and industrial		0		$	0
	Vacant land, land development and residential construction		0			0
	Real estate – owner occupied		0			0
	Real estate – non-owner occupied		0			0
	Real estate – multi-family and residential rental		0			0
	Total commercial		0			0
	Retail:
	Home equity and other		0			0
	1-4 family mortgages		0			0
	Total retail		0			0
	Total		0		$	0
					Recorded
		Number of			Principal
		Contracts			Balance
	Commercial:
	Commercial and industrial		0		$	0
	Vacant land, land development and residential construction		0			0
	Real estate – owner occupied		0			0
	Real estate – non-owner occupied		0			0
	Real estate – multi-family and residential rental		0			0
	Total commercial		0			0
	Retail:
	Home equity and other		0			0
	1-4 family mortgages		0			0
	Total retail		0			0
	Total		0		$	0
					Recorded
		Number of			Principal
		Contracts			Balance
	Commercial:
	Commercial and industrial		0		$	0
	Vacant land, land development and residential construction		0			0
	Real estate – owner occupied		0			0
	Real estate – non-owner occupied		0			0
	Real estate – multi-family and residential rental		0			0
	Total commercial		0			0
	Retail:
	Home equity and other		0			0
	1-4 family mortgages		0			0
	Total retail		0			0
	Total		0		$	0
					Recorded
		Number of			Principal
		Contracts			Balance
	Commercial:
	Commercial and industrial		0		$	0
	Vacant land, land development and residential construction		0			0
	Real estate – owner occupied		0			0
	Real estate – non-owner occupied		0			0
	Real estate – multi-family and residential rental		0			0
	Total commercial		0			0
	Retail:
	Home equity and other		0			0
	1-4 family mortgages		0			0
	Total retail		0			0
	Total		0		$	0
Trouble Debt Restructuring Activity [Table Text Block]	'
					Commercial										Commercial
					Vacant Land,			Commercial			Commercial				Real Estate -
		Commercial			Land Development,			Real Estate -			Real Estate -				Multi-Family
		and			and Residential			Owner			Non-Owner				and Residential
		Industrial			Construction			Occupied			Occupied				Rental
	Commercial Loan Portfolio:
	Beginning Balance	$	1,404,000		$	4,250,000		$	1,756,000		$	21,629,000			$	732,000
	Charge-Offs		(67,000	)		0			0			0				0
	Payments		(161,000	)		(464,000	)		(42,000	)		(2,965,000	)			(13,000	)
	Transfers to ORE		0			0			0			0				0
	Net Additions/Deletions		0			0			997,000			0				0
	Ending Balance	$	1,176,000		$	3,786,000		$	2,711,000		$	18,664,000			$	719,000
		Retail			Retail
		Home Equity			1-4 Family
		and Other			Mortgages
	Retail Loan Portfolio:
	Beginning Balance	$	0		$	2,122,000
	Charge-Offs		0			0
	Payments		0			(45,000	)
	Transfers to ORE		0			0
	Net Additions/Deletions		0			0
	Ending Balance	$	0		$	2,077,000
					Commercial										Commercial
					Vacant Land,			Commerical			Commercial				Real Estate -
		Commercial			Land Development,			Real Estate -			Real Estate -				Multi-Family
		and			and Residential			Owner			Non-Owner				and Residential
		Industrial			Construction			Occupied			Occupied				Rental
	Commercial Loan Portfolio:
	Beginning Balance	$	1,656,000		$	4,501,000		$	1,816,000		$	22,311,000			$	2,620,000
	Charge-Offs		(67,000	)		0			(11,000	)		0				(420,000	)
	Payments		(427,000	)		(3,613,000	)		(90,000	)		(3,966,000	)			(1,481,000	)
	Transfers to ORE		0			0			0			0				0
	Net Additions/Deletions		14,000			2,898,000			996,000			319,000				0
	Ending Balance	$	1,176,000		$	3,786,000		$	2,711,000		$	18,664,000			$	719,000
		Retail			Retail
		Home Equity			1-4 Family
		and Other			Mortgages
	Retail Loan Portfolio:
	Beginning Balance	$	0		$	2,191,000
	Charge-Offs		0			0
	Payments		0			(114,000	)
	Transfers to ORE		0			0
	Net Additions/Deletions		0			0
	Ending Balance	$	0		$	2,077,000
					Commercial										Commercial
					Vacant Land,			Commercial			Commercial				Real Estate -
		Commercial			Land Development,			Real Estate -			Real Estate -				Multi-Family
		and			and Residential			Owner			Non-Owner				and Residential
		Industrial			Construction			Occupied			Occupied				Rental
	Commercial Loan Portfolio:
	Beginning Balance	$	3,269,000		$	2,327,000		$	3,879,000		$	35,003,000			$	2,958,000
	Charge-Offs		0			(30,000	)		(70,000	)		(5,000	)			0
	Payments		(1,063,000	)		(104,000	)		(979,000	)		(574,000	)			(183,000	)
	Transfers to ORE		0			0			0			0				0
	Net Additions/Deletions		60,000			3,247,000			749,000			0				0
	Ending Balance	$	2,266,000		$	5,440,000		$	3,579,000		$	34,424,000			$	2,775,000
		Retail			Retail
		Home Equity			1-4 Family
		and Other			Mortgages
	Retail Loan Portfolio:
	Beginning Balance	$	0		$	152,000
	Charge-Offs		0			0
	Payments		0			(2,000	)
Transfers to ORE		0			0
Net Additions/Deletions		0			1,879,000
Ending Balance	$	0		$	2,029,000
				Commercial										Commercial
				Vacant Land,			Commercial			Commercial				Real Estate -
	Commercial			Land Development,			Real Estate -			Real Estate -				Multi-Family
	and			and Residential			Owner			Non-Owner				and Residential
	Industrial			Construction			Occupied			Occupied				Rental
Commercial Loan Portfolio:
Beginning Balance	$	2,721,000		$	3,071,000		$	4,115,000		$	37,672,000			$	3,025,000
Charge-Offs		(34,000	)		(725,000	)		(70,000	)		(716,000	)			(15,000	)
Payments		(1,578,000	)		(153,000	)		(1,039,000	)		(3,786,000	)			(235,000	)
Transfers to ORE		(74,000	)		0			(363,000	)		(802,000	)			0
Net Additions/Deletions		1,231,000			3,247,000			936,000			2,056,000				0
Ending Balance	$	2,266,000		$	5,440,000		$	3,579,000		$	34,424,000			$	2,775,000
	Retail			Retail
	Home Equity			1-4 Family
	and Other			Mortgages
Retail Loan Portfolio:
Beginning Balance	$	0		$	155,000
Charge-Offs		0			0
Payments		0			(5,000	)
Transfers to ORE		0			0
Net Additions/Deletions		0			1,879,000
Ending Balance	$	0		$	2,029,000
Allowance Related to Loans Categorized as Troubled Debt Restructurings [Table Text Block]	'
		June 30,			December 31,
		2014			2013
	Commercial:
	Commercial and industrial	$	60,000		$	187,000
	Vacant land, land development, and residential construction		341,000			798,000
	Real estate – owner occupied		679,000			528,000
	Real estate – non-owner occupied		7,285,000			7,828,000
	Real estate – multi-family and residential rental		499,000			1,010,000
	Total commercial		8,864,000			10,351,000
	Retail:
	Home equity and other		0			0
	1-4 family mortgages		0			0
	Total retail		0			0
	Total related allowance	$	8,864,000		$	10,351,000
Retail Loan [Member]	'
Note 4 - Loans and Allowance for Loan Losses (Tables) [Line Items]	'
Financing Receivable Credit Quality Indicators [Table Text Block]	'
		Retail			Retail
		Home Equity			1-4 Family
		and Other			Mortgages
	Total retail	$	35,151,000		$	33,337,000
		Retail			Retail
		Home Equity			1-4 Family
		and Other			Mortgages
	Total retail	$	134,557,000		$	182,702,000
		Retail			Retail
		Home Equity			1-4 Family
		and Other			Mortgages
	Total retail	$	35,080,000		$	31,467,000

Note_5_Premises_and_Equipment_1

Note 5 - Premises and Equipment, Net (Tables)	6 Months Ended
	Jun. 30, 2014
Property, Plant and Equipment [Abstract]	'
Property, Plant and Equipment [Table Text Block]	'
		June 30,		December 31,
		2014		2013
	Land, buildings and improvements	$	55,352,000	$	33,289,000
	Furniture and equipment		15,518,000		12,718,000
			70,870,000		46,007,000
	Less: accumulated depreciation		21,867,000		21,109,000
	Premises and equipment, net	$	49,003,000	$	24,898,000

Note_6_Deposits_Tables

Note 6 - Deposits (Tables)	6 Months Ended
	Jun. 30, 2014
Disclosure Text Block [Abstract]	'
Summary of Deposits and Percentage Change in Deposits	'
												Percent
		30-Jun-14					31-Dec-13					Increase
		Balance		%			Balance		%			(Decrease)
	Noninterest-bearing checking	$	515,646,000		22.4	%	$	224,580,000		20.1	%		129.6	%
	Interest-bearing checking		424,362,000		18.4			197,388,000		17.6			115
	Money market		237,798,000		10.3			133,369,000		11.9			78.3
	Savings		341,924,000		14.8			52,606,000		4.7			550
	Time, under $100,000		208,417,000		9.1			43,251,000		3.9			381.9
	Time, $100,000 and over		387,305,000		16.8			254,600,000		22.8			52.1
			2,115,452,000		91.8			905,794,000		81			133.5
	Out-of-area time, under $100,000		3,150,000		0.2			4,078,000		0.4			(22.8	)
	Out-of-area time, $100,000 and over		184,659,000		8			209,039,000		18.6			(11.7	)
			187,809,000		8.2			213,117,000		19			(11.9	)
	Total deposits	$	2,303,261,000		100	%	$	1,118,911,000		100	%		105.8	%

Note_7_Securities_Sold_Under_A1

Note 7 - Securities Sold Under Agreements to Repurchase (Tables)	6 Months Ended
	Jun. 30, 2014
Disclosure Text Block [Abstract]	'
Schedule of Repurchase Agreements [Table Text Block]	'
		Six Months Ended			Twelve Months Ended
		30-Jun-14			31-Dec-13
	Outstanding balance at end of period	$	124,108,000		$	69,305,000
	Average interest rate at end of period		0.1	%		0.12	%
	Average daily balance during the period	$	79,003,000		$	65,939,000
	Average interest rate during the period		0.12	%		0.12	%
	Maximum daily balance during the period	$	126,621,000		$	78,960,000

Note_8_Federal_Home_Loan_Bank_1

Note 8 - Federal Home Loan Bank Advances (Tables)	6 Months Ended
	Jun. 30, 2014
Disclosure Text Block [Abstract]	'
Maturities of Currently Outstanding FHLB Advances [Table Text Block]	'
	2014	$	3,000,000
	2015		6,000,000
	2016		3,044,000
	2017		45,000,000
	2018		0

Note_9_Stockbased_Compensation1

Note 9 - Stock-based Compensation (Tables)	6 Months Ended
	Jun. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Schedule of Share-based Compensation, Activity [Table Text Block]	'
			2014						2013								2012
						Weighted							Weighted								Weighted
						Average							Average								Average
			Shares			Fair Value			Shares				Fair Value				Shares				Fair Value
	Nonvested at beginning of year			63,800		$	14.3			66,100			$	14.3				38,650			$	6.2
	Granted			0		NA				0			NA					66,100				14.3
	Vested			(63,300	)		14.3			0			NA					(38,266	)			6.2
	Forfeited			(500	)		14.3			(2,300	)			14.3				(384	)			6.2
	Nonvested at end of period			0		$	NA			63,800			$	14.3				66,100			$	14.3
			2014						2013								2012
						Weighted							Weighted								Weighted
						Average							Average								Average
						Exercise							Exercise								Exercise
			Shares			Price			Shares				Price				Shares				Price
	Outstanding at beginning of year			60,876		$	33.11			152,896			$	26.15				214,903			$	22.4
	Granted			0		NA				0			NA					0			NA
	Exercised			(2,845	)		17.74			(51,055	)			13.72				(50,930	)			10.83
	Forfeited or expired			(1,141	)		37.55			(40,965	)			31.3				(11,077	)			23.77
	Outstanding at end of period			56,890		$	33.79			60,876			$	33.11				152,896			$	26.15
	Options exercisable at period-end			56,890		$	33.79			60,876			$	33.11				152,896			$	26.15
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]	'
							Outstanding								Exercisable
									Weighted Average		Weighted								Weighted
	Range of								Remaining		Average								Average
	Exercise								Contractual		Exercise								Exercise
	Prices						Number		Life (years)		Price				Number				Price
		$6.21	-	$	8			2,700	1.4		$	6.21				2,700			$	6.21
		$32.01	-	$	36			51,300	0.9			34.87				51,300				34.87
		$40.01	-	$	44			2,890	0.3			40.28				2,890				40.28
		Outstanding at end of period						56,890	0.9		$	33.79				56,890			$	33.79
							Outstanding								Exercisable
									Weighted Average		Weighted								Weighted
	Range of								Remaining		Average								Average
	Exercise								Contractual		Exercise								Exercise
	Prices						Number		Life (years)		Price				Number				Price
		$4.00	-	$	8.00			78,855	5.4		$	6.54				62,215			$	6.9
		$8.01	-	$	12			31,830	5.4			8.6				24,740				8.6
		$12.01	-	$	16			46,000	3.4			16				46,000				16
		$20.01	-	$	24			85,962	1.9			22.43				85,962				22.43
		$24.01	-	$	28			36,456	0.4			24.46				36,456				24.46
	Outstanding at end of period							279,103	3.3		$	15.57				255,373			$	16.44
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block]	'
			2014			2013			2012
	Minimum exercise price		$	6.21		$	6.21		$	6.21
	Maximum exercise price			40.28			40.28			40.28
	Average remaining option term (years)			0.9			1.4			1.9
			2014			2013			2012
	Aggregate intrinsic value of stock options exercised		$	11,000		$	408,000		$	307,000
	Cash received from stock option exercises			50,000			289,000			227,000
	Tax benefit realized from stock option exercises			0			0			0
	Weighted average per share fair value of stock options granted		NA			NA			NA
	Minimum exercise price		$	7.8
	Maximum exercise price			24.46
	Average remaining option term (in years)		3.3
	Aggregate intrinsic value of stock options exercised		$	40,000
	Cash received from stock option exercises			24,000
	Tax benefit realized from stock option exercises			0
	Weighted average per share fair value of stock options granted		NA
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]	'
						Weighted
						Average
						Exercise
			Shares			Price
	Outstanding at beginning of year			0		$	NA
	Granted			0			NA
	Assumed as part of merger			282,178			15.48
	Exercised			(3,075	)		7.8
	Forfeited or expired			0		NA
	Outstanding at end of period			279,103		$	15.57
	Options exercisable at period-end			255,373		$	16.44

Note_10_Commitments_and_OffBal1

Note 10 - Commitments and Off-Balance Sheet Risk (Tables)	6 Months Ended
	Jun. 30, 2014
Disclosure Text Block Supplement [Abstract]	'
Summary of Contractual Amounts of Financial Instruments with Off-balance Sheet Risk [Table Text Block]	'
		June 30,		December 31,
		2014		2013
	Commercial unused lines of credit	$	339,146,000	$	257,937,000
	Unused lines of credit secured by 1 – 4 family residential properties		60,439,000		23,429,000
	Credit card unused lines of credit		9,180,000		9,013,000
	Other consumer unused lines of credit		9,302,000		5,695,000
	Commitments to make loans		177,363,000		58,799,000
	Standby letters of credit		37,598,000		19,670,000
		$	633,028,000	$	374,543,000

Note_12_Fair_Values_of_Financi1

Note 12 - Fair Values of Financial Instruments (Tables)	6 Months Ended
	Jun. 30, 2014
Fair Value Disclosures [Abstract]	'
Fair Value, by Balance Sheet Grouping [Table Text Block]	'
		Level in		30-Jun-14				31-Dec-13
		Fair Value		Carrying		Fair		Carrying		Fair
		Hierarchy		Values		Values		Values		Values
	Financial assets:
	Cash	Level 1		$	14,040	$	14,040	$	1,464	$	1,464
	Cash equivalents	Level 2			104,813		104,813		145,501		145,501
	Securities available for sale		-1		475,275		475,275		131,178		131,178
	FHLB stock		-2		19,226		19,226		11,961		11,961
	Loans, net	Level 3			2,052,626		2,049,625		1,030,422		1,027,300
	Bank owned life insurance	Level 2			55,693		55,693		51,377		51,377
	Accrued interest receivable	Level 2			7,711		7,711		3,649		3,649
	Financial liabilities:
	Deposits	Level 2			2,303,261		2,305,253		1,118,911		1,120,576
	Repurchase agreements	Level 2			124,108		124,108		69,305		69,305
	FHLB advances	Level 2			57,044		57,235		45,000		45,139
	Subordinated debentures	Level 2			54,131		54,087		32,990		32,974
	Accrued interest payable	Level 2			2,159		2,159		2,041		2,041
	Interest rate swap		-1		390		390		264		264

Note_13_Fair_Values_Tables

Note 13 - Fair Values (Tables)	6 Months Ended
	Jun. 30, 2014
Disclosure Text Block [Abstract]	'
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	'
					Quoted
					Prices in
					Active		Significant
					Markets for		Other			Significant
					Identical		Observable			Unobservable
					Assets		Inputs			Inputs
			Total		(Level 1)		(Level 2)			(Level 3)
	Available for sale securities
	U.S. Government agency debt obligations	$	213,706,000		$	0	$	213,706,000		$	0
	Mortgage-backed securities		108,172,000			0		108,172,000			0
	Municipal general obligation bonds		140,169,000			0		128,791,000			11,378,000
	Municipal revenue bonds		11,324,000			0		11,324,000			0
	Other investments		1,904,000			0		1,904,000			0
	Interest rate swap		(390,000	)		0		(390,000	)		0
	Total	$	474,885,000		$	0	$	463,507,000		$	11,378,000
					Quoted
					Prices in
					Active		Significant
					Markets for		Other			Significant
					Identical		Observable			Unobservable
					Assets		Inputs			Inputs
		Total			(Level 1)		(Level 2)			(Level 3)
	Available for sale securities
	U.S. Government agency debt obligations	$	98,477,000		$	0	$	98,477,000		$	0
	Mortgage-backed securities		13,558,000			0		13,558,000			0
	Municipal general obligation bonds		16,872,000			0		16,872,000			0
	Municipal revenue bonds		916,000			0		916,000			0
	Other investments		1,355,000			0		1,355,000			0
	Interest rate swap		(264,000	)		0		(264,000	)		0
	Total	$	130,914,000		$	0	$	130,914,000		$	0
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis, Valuation Techniques [Table Text Block]	'
					Quoted
					Prices in
					Active		Significant
					Markets for		Other			Significant
					Identical		Observable			Unobservable
					Assets		Inputs			Inputs
		Total			(Level 1)		(Level 2)			(Level 3)
	Impaired loans (1)	$	18,899,000		$	0	$	0		$	18,899,000
	Foreclosed assets (1)		2,878,000			0		0			2,878,000
	Total	$	21,777,000		$	0	$	0		$	21,777,000
					Quoted
					Prices in
					Active		Significant
					Markets for		Other			Significant
					Identical		Observable			Unobservable
					Assets		Inputs			Inputs
		Total			(Level 1)		(Level 2)			(Level 3)
	Impaired loans (1)	$	23,405,000		$	0	$	0		$	23,405,000
	Foreclosed assets (1)		2,851,000			0		0			2,851,000
	Total	$	26,256,000		$	0	$	0		$	26,256,000

Note_14_Regulatory_Matters_Tab

Note 14 - Regulatory Matters (Tables)	6 Months Ended
	Jun. 30, 2014
Disclosure Text Block [Abstract]	'
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block]	'
												Minimum Required
												to be Well
							Minimum Required					Capitalized Under
							for Capital					Prompt Corrective
		Actual					Adequacy Purposes					Action Regulations
		Amount		Ratio			Amount		Ratio			Amount		Ratio
	30-Jun-14
	Total capital (to risk weighted assets)
	Consolidated	$	323,221		14	%	$	184,700		8	%	$	NA	NA
	Bank		318,888		13.7			185,762		8			232,203		10	%
	Tier 1 capital (to risk weighted assets)
	Consolidated		302,365		13.1			92,350		4		NA		NA
	Bank		298,032		12.8			92,881		4			139,322		6
	Tier 1 capital (to average assets)
	Consolidated		302,365		16.7			72,553		4		NA		NA
	Bank		298,032		16.4			72,810		4			91,012		5
	31-Dec-13
	Total capital (to risk weighted assets)
	Consolidated	$	193,925		15.9	%	$	97,498		8	%	$	NA	NA
	Bank		190,493		15.7			97,329		8			121,662		10	%
	Tier 1 capital (to risk weighted assets)
	Consolidated		178,598		14.7			48,749		4		NA		NA
	Bank		175,192		14.4			48,665		4			72,997		6
	Tier 1 capital (to average assets)
	Consolidated		178,598		12.5			57,006		4			NA	NA
	Bank		175,192		12.3			56,860		4			71,075		5

Note_1_Significant_Accounting_1

Note 1 - Significant Accounting Policies (Details) (USD $)	6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended	6 Months Ended		6 Months Ended
In Millions, except Share data, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2013	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2014
			Employee Stock Option [Member]	Employee Stock Option [Member]	Employee Stock Option [Member]	Employee Stock Option [Member]	Restricted Stock [Member]	Restricted Stock [Member]	Servicing Contracts [Member]	Core Deposits [Member]
Note 1 - Significant Accounting Policies (Details) [Line Items]	'	'	'	'	'	'	'	'	'	'
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	'	'	159,000	21,000	159,000	21,000	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	'	'	177,000	132,000	177,000	132,000	'	'	'	'
Incremental Common Shares Attributable to Participating Nonvested Shares with Non-forfeitable Dividend Rights	'	'	'	'	'	'	64,000	64,000	'	'
Interest Income on Commercial and Mortgage Loans, Discontinued Period	'90 days	'	'	'	'	'	'	'	'	'
Maximum Delinquency Period for Consumer and Credit Card Loans to be Charged-off	'120 days	'	'	'	'	'	'	'	'	'
Disposal Group, Including Discontinued Operation, Mortgage Loans (in Dollars)	$1.90	$1.10	'	'	'	'	'	'	'	'
Servicing Asset (in Dollars)	'	'	'	'	'	'	'	'	$593	'
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	'	'	'	'	'	'	'	'	'	'10 years

Note_2_Business_Combination_De

Note 2 - Business Combination (Details) (USD $)

3 Months Ended

6 Months Ended

0 Months Ended

1 Months Ended

0 Months Ended

1 Months Ended

3 Months Ended

6 Months Ended

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Dec. 31, 2013

Jun. 01, 2014

Jun. 01, 2014

Jun. 30, 2014

Jun. 01, 2014

Jun. 01, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 01, 2014

Jun. 01, 2014

Acquired Trusts [Member]

Acquired Trusts [Member]

Servicing Contracts [Member]

Servicing Contracts [Member]

Firstbank Corporation [Member]

Firstbank Corporation [Member]

Firstbank Corporation [Member]

Firstbank Corporation [Member]

Firstbank Corporation [Member]

Firstbank Corporation [Member]

Firstbank Corporation [Member]

Firstbank Corporation [Member]

Firstbank Corporation [Member]

Firstbank Corporation [Member]

Firstbank Corporation [Member]

Estimate of Fair Value Measurement [Member]

London Interbank Offered Rate (LIBOR) [Member]

London Interbank Offered Rate (LIBOR) [Member]

Minimum [Member]

Maximum [Member]

Note 2 - Business Combination (Details) [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets

'

'

'

'

'

'

'

'

'

'

$1,451,483,000

$1,451,483,000

$1,451,483,000

$1,451,483,000

$1,500,000,000

'

Business Combination, Branches Acquired

'

'

'

'

'

'

'

'

'

'

'

'

'

'

46

'

Business Acquisition, Conversion of Stock Per Share (in Shares)

'

'

'

'

'

'

'

'

'

1

'

'

'

'

'

'

Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in Shares)

'

'

'

'

'

'

'

'

'

8,087,272

'

8,087,272

'

'

'

'

Goodwill

50,870,000

'

50,870,000

'

0

'

'

'

'

'

50,870,000

50,870,000

50,870,000

50,870,000

50,900,000

'

Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles

'

'

'

'

'

'

'

'

7,400,000

'

'

'

'

'

'

'

Amortization

'

'

'

'

'

'

'

100,000

'

'

'

100,000

'

'

'

'

Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual

'

'

'

'

'

'

'

'

'

'

4,500,000

'

'

'

'

'

Business Combination, Acquisition Related Costs

3,453,000

46,000

3,830,000

60,000

'

'

'

'

'

'

'

'

3,500,000

3,800,000

'

'

Business Combination, Acquired Receivables and Certain Loans, Estimated Uncollectible Cash Flows

'

'

'

'

'

'

'

'

'

'

'

'

'

'

10,400,000

'

Business Combination, Acquired Receivables and Certain Loans, Pre-acquisition Charge-offs

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2,800,000

'

Business Combination, Acquired Receivables and Certain Loans, Estimated Uncollectible Interest

'

'

'

'

'

'

'

'

'

'

'

'

'

'

3,900,000

'

Business Combination, Acquired Receivables, Gross Contractual Amount

'

'

'

'

'

'

'

'

'

'

'

'

'

'

926,400,000

'

Business Combination, Acquired Receivables, Unaccredted Discount

'

'

'

'

'

'

'

'

'

'

'

'

'

'

8,100,000

'

Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$36,100,000

$21,100,000

Business Combination, Debt Assumed, Number of Trusts

'

'

'

'

'

'

'

'

'

'

'

'

'

'

4

'

Debt Instrument, Basis Spread on Variable Rate

'

'

'

'

'

1.35%

1.99%

'

'

'

'

'

'

'

'

'

Note_2_Business_Combination_De1

Note 2 - Business Combination (Details) - Purchase Price (Firstbank Corporation [Member], USD $)	0 Months Ended	1 Months Ended
	Jun. 01, 2014	Jun. 30, 2014
Firstbank Corporation [Member]	'	'
Business Acquisition, Equity Interests Issued or Issuable [Line Items]	'	'
Mercantile common shares issued for Firstbank common shares (in Shares)	8,087,272	8,087,272
Price per share, based on Mercantile closing price on May 30, 2014 (in Dollars per share)	'	$21.43
Value of common stock issued	'	$173,310,000
Replacement stock options	'	1,664,000
Total purchase price	'	$174,974,000

Note_2_Business_Combination_De2

Note 2 - Business Combination (Details) - Net Assets Acquired (USD $)	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014	Jun. 01, 2014
			Core Deposits [Member]	Servicing Contracts [Member]	Firstbank Corporation [Member]	Firstbank Corporation [Member]
			Firstbank Corporation [Member]	Firstbank Corporation [Member]
Assets	'	'	'	'	'	'
Cash and cash equivalents	'	'	'	'	$91,806,000	'
Securities	'	'	'	'	358,599,000	'
Total loans	'	'	'	'	943,662,000	'
Premises and equipment	'	'	'	'	24,049,000	'
Intangibles	'	'	17,478,000	7,389,000	'	'
Other assets	'	'	'	'	8,500,000	'
Total Assets	'	'	'	'	1,451,483,000	1,500,000,000
Liabilities	'	'	'	'	'	'
Deposits	'	'	'	'	1,229,609,000	'
Borrowings	'	'	'	'	87,615,000	'
Other liabilities	'	'	'	'	10,155,000	'
Total Liabilities	'	'	'	'	1,327,379,000	'
Net Identifiable Assets Acquired	'	'	'	'	124,104,000	'
Goodwill	$50,870,000	$0	'	'	$50,870,000	$50,900,000

Note_2_Business_Combination_De3

Note 2 - Business Combination (Details) - Pro Forma Information (Firstbank Corporation [Member], USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Firstbank Corporation [Member]	'	'	'	'
Note 2 - Business Combination (Details) - Pro Forma Information [Line Items]	'	'	'	'
Net interest income	$15,453,000	$11,212,000	$26,417,000	$22,566,000
Noninterest expense	17,160,000	13,407,000	26,862,000	22,786,000
Net income	$863,000	$900,000	$4,186,000	$5,043,000
Net income per diluted share (in Dollars per share)	$0.05	$0.05	$0.25	$0.30

Note_2_Business_Combination_De4

Note 2 - Business Combination (Details) - Acquired Loans Fair Value (Firstbank Corporation [Member], USD $)	Jun. 30, 2014
In Thousands, unless otherwise specified
Commercial Loans:	'
Loans	$943,662,000
Commercial and Industrial [Member] | Nonperforming Financing Receivable [Member]	'
Commercial Loans:	'
Loans	878,000
Commercial and Industrial [Member] | Performing Financing Receivable [Member]	'
Commercial Loans:	'
Loans	163,316,000
Commercial and Industrial [Member]	'
Commercial Loans:	'
Loans	164,194,000
Commercial Real Estate Portfolio Segment [Member] | Nonperforming Financing Receivable [Member]	'
Commercial Loans:	'
Loans	12,973,000
Commercial Real Estate Portfolio Segment [Member] | Performing Financing Receivable [Member]	'
Commercial Loans:	'
Loans	378,016,000
Commercial Real Estate Portfolio Segment [Member]	'
Commercial Loans:	'
Loans	390,989,000
Commercial Real Estate Construction Financing Receivable [Member] | Nonperforming Financing Receivable [Member]	'
Commercial Loans:	'
Loans	1,289,000
Commercial Real Estate Construction Financing Receivable [Member] | Performing Financing Receivable [Member]	'
Commercial Loans:	'
Loans	33,726,000
Commercial Real Estate Construction Financing Receivable [Member]	'
Commercial Loans:	'
Loans	35,015,000
Commercial Portfolio Segment [Member] | Nonperforming Financing Receivable [Member]	'
Commercial Loans:	'
Loans	15,140,000
Commercial Portfolio Segment [Member] | Performing Financing Receivable [Member]	'
Commercial Loans:	'
Loans	575,058,000
Commercial Portfolio Segment [Member]	'
Commercial Loans:	'
Loans	590,198,000
Residential Portfolio Segment [Member] | Nonperforming Financing Receivable [Member]	'
Commercial Loans:	'
Loans	9,694,000
Residential Portfolio Segment [Member] | Performing Financing Receivable [Member]	'
Commercial Loans:	'
Loans	216,653,000
Residential Portfolio Segment [Member]	'
Commercial Loans:	'
Loans	226,347,000
Consumer Installment Portfolio Segment [Member] | Nonperforming Financing Receivable [Member]	'
Commercial Loans:	'
Loans	167,000
Consumer Installment Portfolio Segment [Member] | Performing Financing Receivable [Member]	'
Commercial Loans:	'
Loans	61,657,000
Consumer Installment Portfolio Segment [Member]	'
Commercial Loans:	'
Loans	61,824,000
Consumer Home Equity Line Portfolio Segment [Member] | Nonperforming Financing Receivable [Member]	'
Commercial Loans:	'
Loans	288,000
Consumer Home Equity Line Portfolio Segment [Member] | Performing Financing Receivable [Member]	'
Commercial Loans:	'
Loans	52,054,000
Consumer Home Equity Line Portfolio Segment [Member]	'
Commercial Loans:	'
Loans	52,342,000
Consumer Construction Portfolio Segment [Member] | Nonperforming Financing Receivable [Member]	'
Commercial Loans:	'
Loans	76,000
Consumer Construction Portfolio Segment [Member] | Performing Financing Receivable [Member]	'
Commercial Loans:	'
Loans	12,875,000
Consumer Construction Portfolio Segment [Member]	'
Commercial Loans:	'
Loans	12,951,000
Consumer Portfolio Segment [Member] | Nonperforming Financing Receivable [Member]	'
Commercial Loans:	'
Loans	10,225,000
Consumer Portfolio Segment [Member] | Performing Financing Receivable [Member]	'
Commercial Loans:	'
Loans	343,239,000
Consumer Portfolio Segment [Member]	'
Commercial Loans:	'
Loans	353,464,000
Nonperforming Financing Receivable [Member]	'
Commercial Loans:	'
Loans	25,365,000
Performing Financing Receivable [Member]	'
Commercial Loans:	'
Loans	$918,297,000

Note_2_Business_Combination_De5

Note 2 - Business Combination (Details) - Acquired Impaired and Non-impaired Loans (Firstbank Corporation [Member], USD $)	Jun. 30, 2014
Firstbank Corporation [Member]	'
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]	'
Contractual required payments	$44,936,000
Nonaccretable difference	17,057,000
Expected cash flows	27,879,000
Accretable yield	2,514,000
Carrying balance	$25,365,000

Note_3_Securities_Details

Note 3 - Securities (Details) (USD $)

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Jun. 30, 2014

Dec. 31, 2013

Debt Securities [Member]

Mutual Funds [Member]

Mutual Funds [Member]

State of Michigan and all its Political Subdivisions [Member]

State of Michigan and all its Political Subdivisions [Member]

US States and Political Subdivisions Debt Securities [Member]

US States and Political Subdivisions Debt Securities [Member]

Securities Other Than US Government Agencies and the State of Michigan and Political Subdivisions [Member]

US Government Agency Debt Obligations and Mortgage-Backed Securities [Member]

US Government Agency Debt Obligations and Mortgage-Backed Securities [Member]

Stockholders' Equity, Total [Member]

Securities Issued Concentration Risk [Member]

Note 3 - Securities (Details) [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions

'

'

452

1

'

'

'

'

'

'

'

'

Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value

$325,525,000

$88,446,000

'

'

$1,355,000

'

'

'

'

'

'

'

Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss

7,149,000

10,100,000

'

'

31,000

'

'

'

'

'

'

'

Available-for-sale Debt Securities, Amortized Cost Basis

471,333,000

'

'

'

'

114,800,000

17,400,000

36,400,000

36,300,000

'

'

'

Available-for-sale Securities

475,275,000

[1]

131,178,000

[1]

'

'

1,355,000

115,200,000

17,800,000

'

'

'

'

'

Concentration Risk, Percentage

'

'

'

'

'

'

'

'

'

0.00%

'

'

Available-for-sale Securities, Restricted

'

'

'

'

'

'

'

'

'

'

$272,600,000

$94,400,000

[1]

See Note 13 for a description of the fair value hierarchy as well as a disclosure of levels for classes of financial assets and liabilities.

Note_3_Securities_Details_Avai

Note 3 - Securities (Details) - Available-for-sale Securities (USD $)	Jun. 30, 2014		Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]	'		'
Securities available for sale, amortized cost	$479,435,000		$139,487,000
Securities available for sale, gross unrealized gains	2,989,000		1,791,000
Securities available for sale, gross unrealized losses	-7,149,000		-10,100,000
Securities available for sale	475,275,000	[1]	131,178,000	[1]
US Government Agencies Debt Securities [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Securities available for sale, amortized cost	219,141,000		108,279,000
Securities available for sale, gross unrealized gains	731,000		263,000
Securities available for sale, gross unrealized losses	-6,166,000		-10,065,000
Securities available for sale	213,706,000		98,477,000
Collateralized Mortgage Backed Securities [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Securities available for sale, amortized cost	107,145,000		12,456,000
Securities available for sale, gross unrealized gains	1,249,000		1,102,000
Securities available for sale, gross unrealized losses	-222,000		0
Securities available for sale	108,172,000		13,558,000
Municipal General Obligation Bonds [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Securities available for sale, amortized cost	139,996,000		16,488,000
Securities available for sale, gross unrealized gains	894,000		388,000
Securities available for sale, gross unrealized losses	-721,000		-4,000
Securities available for sale	140,169,000		16,872,000
Municipal Revenue Bonds [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Securities available for sale, amortized cost	11,244,000		878,000
Securities available for sale, gross unrealized gains	115,000		38,000
Securities available for sale, gross unrealized losses	-35,000		0
Securities available for sale	11,324,000		916,000
Other Debt Obligations [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Securities available for sale, amortized cost	1,909,000		'
Securities available for sale, gross unrealized gains	0		'
Securities available for sale, gross unrealized losses	-5,000		'
Securities available for sale	1,904,000		'
Mutual Funds [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Securities available for sale, amortized cost	'		1,386,000
Securities available for sale, gross unrealized gains	'		0
Securities available for sale, gross unrealized losses	'		-31,000
Securities available for sale	'		$1,355,000
[1]	See Note 13 for a description of the fair value hierarchy as well as a disclosure of levels for classes of financial assets and liabilities.

Note_3_Securities_Details_Secu

Note 3 - Securities (Details) - Securities in a Continuous Loss Position (USD $)	Jun. 30, 2014	Dec. 31, 2013
Note 3 - Securities (Details) - Securities in a Continuous Loss Position [Line Items]	'	'
Securities available for sale, continuous unrealized loss position, less than 12 months	$254,971,000	$58,767,000
Securities available for sale, continuous unrealized loss position, less than 12 months, unrealized loss	-1,351,000	-5,833,000
Securities available for sale, continuous unrealized loss position, 12 months or more	70,554,000	29,679,000
Securities available for sale, continuous unrealized loss position, 12 months or more, unrealized loss	-5,798,000	-4,267,000
Securities available for sale, continuous unrealized loss position	325,525,000	88,446,000
Securities available for sale, continuous unrealized loss position, unrealized loss	-7,149,000	-10,100,000
US Government Agencies Debt Securities [Member]	'	'
Note 3 - Securities (Details) - Securities in a Continuous Loss Position [Line Items]	'	'
Securities available for sale, continuous unrealized loss position, less than 12 months	90,627,000	57,117,000
Securities available for sale, continuous unrealized loss position, less than 12 months, unrealized loss	-373,000	-5,798,000
Securities available for sale, continuous unrealized loss position, 12 months or more	69,159,000	29,679,000
Securities available for sale, continuous unrealized loss position, 12 months or more, unrealized loss	-5,793,000	-4,267,000
Securities available for sale, continuous unrealized loss position	159,786,000	86,796,000
Securities available for sale, continuous unrealized loss position, unrealized loss	-6,166,000	-10,065,000
Collateralized Mortgage Backed Securities [Member]	'	'
Note 3 - Securities (Details) - Securities in a Continuous Loss Position [Line Items]	'	'
Securities available for sale, continuous unrealized loss position, less than 12 months	64,108,000	0
Securities available for sale, continuous unrealized loss position, less than 12 months, unrealized loss	-222,000	0
Securities available for sale, continuous unrealized loss position, 12 months or more	0	0
Securities available for sale, continuous unrealized loss position, 12 months or more, unrealized loss	0	0
Securities available for sale, continuous unrealized loss position	64,108,000	0
Securities available for sale, continuous unrealized loss position, unrealized loss	-222,000	0
Municipal General Obligation Bonds [Member]	'	'
Note 3 - Securities (Details) - Securities in a Continuous Loss Position [Line Items]	'	'
Securities available for sale, continuous unrealized loss position, less than 12 months	92,461,000	295,000
Securities available for sale, continuous unrealized loss position, less than 12 months, unrealized loss	-721,000	-4,000
Securities available for sale, continuous unrealized loss position, 12 months or more	0	0
Securities available for sale, continuous unrealized loss position, 12 months or more, unrealized loss	0	0
Securities available for sale, continuous unrealized loss position	92,461,000	295,000
Securities available for sale, continuous unrealized loss position, unrealized loss	-721,000	-4,000
Municipal Revenue Bonds [Member]	'	'
Note 3 - Securities (Details) - Securities in a Continuous Loss Position [Line Items]	'	'
Securities available for sale, continuous unrealized loss position, less than 12 months	7,775,000	0
Securities available for sale, continuous unrealized loss position, less than 12 months, unrealized loss	-35,000	0
Securities available for sale, continuous unrealized loss position, 12 months or more	0	0
Securities available for sale, continuous unrealized loss position, 12 months or more, unrealized loss	0	0
Securities available for sale, continuous unrealized loss position	7,775,000	0
Securities available for sale, continuous unrealized loss position, unrealized loss	-35,000	0
Other Debt Obligations [Member]	'	'
Note 3 - Securities (Details) - Securities in a Continuous Loss Position [Line Items]	'	'
Securities available for sale, continuous unrealized loss position, less than 12 months	0	'
Securities available for sale, continuous unrealized loss position, less than 12 months, unrealized loss	0	'
Securities available for sale, continuous unrealized loss position, 12 months or more	1,395,000	'
Securities available for sale, continuous unrealized loss position, 12 months or more, unrealized loss	-5,000	'
Securities available for sale, continuous unrealized loss position	1,395,000	'
Securities available for sale, continuous unrealized loss position, unrealized loss	-5,000	'
Mutual Funds [Member]	'	'
Note 3 - Securities (Details) - Securities in a Continuous Loss Position [Line Items]	'	'
Securities available for sale, continuous unrealized loss position, less than 12 months	'	1,355,000
Securities available for sale, continuous unrealized loss position, less than 12 months, unrealized loss	'	-31,000
Securities available for sale, continuous unrealized loss position, 12 months or more	'	0
Securities available for sale, continuous unrealized loss position, 12 months or more, unrealized loss	'	0
Securities available for sale, continuous unrealized loss position	'	1,355,000
Securities available for sale, continuous unrealized loss position, unrealized loss	'	($31,000)

Note_3_Securities_Details_Debt

Note 3 - Securities (Details) - Debt Securities by Maturity (USD $)	Jun. 30, 2014
Note 3 - Securities (Details) - Debt Securities by Maturity [Line Items]	'
Due in 2014	0.86%
Due in 2014	$20,435,000
Due in 2014	20,538,000
Due in 2015 through 2019	1.25%
Due in 2015 through 2019	178,246,000
Due in 2015 through 2019	182,962,000
Due in 2020 through 2024	2.95%
Due in 2020 through 2024	78,336,000
Due in 2020 through 2024	88,647,000
Due in 2025 and beyond	3.63%
Due in 2025 and beyond	89,198,000
Due in 2025 and beyond	73,052,000
	2.07%
	471,333,000
	475,275,000
Collateralized Mortgage Backed Securities [Member]	'
Note 3 - Securities (Details) - Debt Securities by Maturity [Line Items]	'
No single maturity, weighted average yield	1.73%
No single maturity, amortized cost	103,209,000
No single maturity, fair value	108,172,000
Other Debt Obligations [Member]	'
Note 3 - Securities (Details) - Debt Securities by Maturity [Line Items]	'
No single maturity, weighted average yield	1.55%
No single maturity, amortized cost	1,909,000
No single maturity, fair value	$1,904,000

Note_4_Loans_and_Allowance_for2

Note 4 - Loans and Allowance for Loan Losses (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Receivables [Abstract]	'	'	'	'	'
Loans and Leases Receivable, Net of Deferred Income	$2,073,482,000	'	$2,073,482,000	'	$1,053,243,000
Loans and Leases Receivable Period Increase (Decrease)	'	'	1,020,000,000	'	'
Loans and Leases Receivable, Percentage, Period Increase (Decrease)	'	'	96.90%	'	'
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	42,600,000	'	42,600,000	'	'
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net	26,100,000	'	26,100,000	'	'
Impaired Financing Receivable, Interest Income, Accrual Method	$400,000	$700,000	$800,000	$1,300,000	'
Loans Modified as Troubled Debt Restructuring Due Period	'30 days	'30 days	'30 days	'30 days	'

Note_4_Loans_and_Allowance_for3

Note 4 - Loans and Allowance for Loan Losses (Details) - Components of Loan Portfolio (USD $)	6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013
Commercial:	'	'	'
Loans (in Dollars)	$2,073,482,000	$1,053,243,000	'
Loans, percentage of portfolio	100.00%	100.00%	'
Loans, percentage of change in loans	96.90%	'	'
Originated Loan [Member] | Commercial and Industrial [Member]	'	'	'
Commercial:	'	'	'
Loans (in Dollars)	342,375,000	286,373,000	'
Loans, percentage of portfolio	29.90%	27.20%	'
Loans, percentage of change in loans	19.60%	'	'
Originated Loan [Member] | Commercial Vacant Land and Land Development and Residential Construction Loan [Member]	'	'	'
Commercial:	'	'	'
Loans (in Dollars)	32,214,000	36,741,000	'
Loans, percentage of portfolio	2.80%	3.50%	'
Loans, percentage of change in loans	-12.30%	'	'
Originated Loan [Member] | Commercial Real Estate Owner Occupied Loan [Member]	'	'	'
Commercial:	'	'	'
Loans (in Dollars)	264,596,000	261,877,000	'
Loans, percentage of portfolio	23.10%	24.90%	'
Loans, percentage of change in loans	1.00%	'	'
Originated Loan [Member] | Commercial Real Estate Non Owner Occupied Loan [Member]	'	'	'
Commercial:	'	'	'
Loans (in Dollars)	399,855,000	364,066,000	'
Loans, percentage of portfolio	34.90%	34.60%	'
Loans, percentage of change in loans	9.80%	'	'
Originated Loan [Member] | Commercial Real Estate Multi Family and Residential Rental Loan [Member]	'	'	'
Commercial:	'	'	'
Loans (in Dollars)	37,569,000	37,639,000	'
Loans, percentage of portfolio	3.30%	3.50%	'
Loans, percentage of change in loans	-0.20%	'	'
Originated Loan [Member] | Commercial Portfolio Segment [Member]	'	'	'
Commercial:	'	'	'
Loans (in Dollars)	1,076,609,000	986,696,000	985,616,000
Loans, percentage of portfolio	94.00%	93.70%	'
Loans, percentage of change in loans	9.10%	'	'
Originated Loan [Member] | Retail Home Equity and Other [Member]	'	'	'
Commercial:	'	'	'
Loans (in Dollars)	35,151,000	35,080,000	'
Loans, percentage of portfolio	3.10%	3.30%	'
Loans, percentage of change in loans	0.20%	'	'
Originated Loan [Member] | Retail 1-4 Family Mortgages [Member]	'	'	'
Commercial:	'	'	'
Loans (in Dollars)	33,337,000	31,467,000	'
Loans, percentage of portfolio	2.90%	3.00%	'
Loans, percentage of change in loans	5.90%	'	'
Originated Loan [Member] | Retail Loan [Member]	'	'	'
Commercial:	'	'	'
Loans (in Dollars)	68,488,000	66,547,000	73,046,000
Loans, percentage of portfolio	6.00%	6.30%	'
Loans, percentage of change in loans	2.90%	'	'
Originated Loan [Member]	'	'	'
Commercial:	'	'	'
Loans (in Dollars)	1,145,097,000	1,053,243,000	1,058,662,000
Loans, percentage of portfolio	100.00%	100.00%	'
Loans, percentage of change in loans	8.70%	'	'
Acquired Loan [Member] | Commercial and Industrial [Member]	'	'	'
Commercial:	'	'	'
Loans (in Dollars)	273,684,000	0	'
Loans, percentage of portfolio	29.50%	'	'
Loans, percentage of change in loans	'	'	'
Acquired Loan [Member] | Commercial Vacant Land and Land Development and Residential Construction Loan [Member]	'	'	'
Commercial:	'	'	'
Loans (in Dollars)	21,091,000	0	'
Loans, percentage of portfolio	2.30%	'	'
Loans, percentage of change in loans	'	'	'
Acquired Loan [Member] | Commercial Real Estate Owner Occupied Loan [Member]	'	'	'
Commercial:	'	'	'
Loans (in Dollars)	119,818,000	0	'
Loans, percentage of portfolio	12.90%	'	'
Loans, percentage of change in loans	'	'	'
Acquired Loan [Member] | Commercial Real Estate Non Owner Occupied Loan [Member]	'	'	'
Commercial:	'	'	'
Loans (in Dollars)	149,434,000	0	'
Loans, percentage of portfolio	16.10%	'	'
Loans, percentage of change in loans	'	'	'
Acquired Loan [Member] | Commercial Real Estate Multi Family and Residential Rental Loan [Member]	'	'	'
Commercial:	'	'	'
Loans (in Dollars)	47,099,000	0	'
Loans, percentage of portfolio	5.10%	'	'
Loans, percentage of change in loans	'	'	'
Acquired Loan [Member] | Commercial Portfolio Segment [Member]	'	'	'
Commercial:	'	'	'
Loans (in Dollars)	611,126,000	0	'
Loans, percentage of portfolio	65.80%	'	'
Loans, percentage of change in loans	'	'	'
Acquired Loan [Member] | Retail Home Equity and Other [Member]	'	'	'
Commercial:	'	'	'
Loans (in Dollars)	134,557,000	0	'
Loans, percentage of portfolio	14.50%	'	'
Loans, percentage of change in loans	'	'	'
Acquired Loan [Member] | Retail 1-4 Family Mortgages [Member]	'	'	'
Commercial:	'	'	'
Loans (in Dollars)	182,702,000	0	'
Loans, percentage of portfolio	19.70%	'	'
Loans, percentage of change in loans	'	'	'
Acquired Loan [Member] | Retail Loan [Member]	'	'	'
Commercial:	'	'	'
Loans (in Dollars)	317,259,000	0	'
Loans, percentage of portfolio	34.20%	'	'
Loans, percentage of change in loans	'	'	'
Acquired Loan [Member]	'	'	'
Commercial:	'	'	'
Loans (in Dollars)	928,385,000	0	'
Loans, percentage of portfolio	100.00%	'	'
Loans, percentage of change in loans	'	'	'
Commercial and Industrial [Member]	'	'	'
Commercial:	'	'	'
Loans (in Dollars)	616,059,000	286,373,000	'
Loans, percentage of portfolio	29.70%	27.20%	'
Loans, percentage of change in loans	115.10%	'	'
Commercial Vacant Land and Land Development and Residential Construction Loan [Member]	'	'	'
Commercial:	'	'	'
Loans (in Dollars)	53,305,000	36,741,000	'
Loans, percentage of portfolio	2.60%	3.50%	'
Loans, percentage of change in loans	45.10%	'	'
Commercial Real Estate Owner Occupied Loan [Member]	'	'	'
Commercial:	'	'	'
Loans (in Dollars)	384,414,000	261,877,000	'
Loans, percentage of portfolio	18.50%	24.90%	'
Loans, percentage of change in loans	46.80%	'	'
Commercial Real Estate Non Owner Occupied Loan [Member]	'	'	'
Commercial:	'	'	'
Loans (in Dollars)	549,289,000	364,066,000	'
Loans, percentage of portfolio	26.50%	34.60%	'
Loans, percentage of change in loans	50.90%	'	'
Commercial Real Estate Multi Family and Residential Rental Loan [Member]	'	'	'
Commercial:	'	'	'
Loans (in Dollars)	84,668,000	37,639,000	'
Loans, percentage of portfolio	4.10%	3.50%	'
Loans, percentage of change in loans	124.90%	'	'
Commercial Portfolio Segment [Member]	'	'	'
Commercial:	'	'	'
Loans (in Dollars)	1,687,735,000	986,696,000	'
Loans, percentage of portfolio	81.40%	93.70%	'
Loans, percentage of change in loans	71.00%	'	'
Retail Home Equity and Other [Member]	'	'	'
Commercial:	'	'	'
Loans (in Dollars)	169,708,000	35,080,000	'
Loans, percentage of portfolio	8.20%	3.30%	'
Loans, percentage of change in loans	383.80%	'	'
Retail 1-4 Family Mortgages [Member]	'	'	'
Commercial:	'	'	'
Loans (in Dollars)	216,039,000	31,467,000	'
Loans, percentage of portfolio	10.40%	3.00%	'
Loans, percentage of change in loans	586.60%	'	'
Retail Loan [Member]	'	'	'
Commercial:	'	'	'
Loans (in Dollars)	$385,747,000	$66,547,000	'
Loans, percentage of portfolio	18.60%	6.30%	'
Loans, percentage of change in loans	479.70%	'	'

Note_4_Loans_and_Allowance_for4

Note 4 - Loans and Allowance for Loan Losses (Details) - Acquired Impaired Loans Accretable Yield (USD $)	6 Months Ended
	Jun. 30, 2014
Acquired Impaired Loans Accretable Yield [Abstract]	'
Balance at January 1, 2014	$0
Ending balance	2,411,000
Additions	2,514,000
Accretion	-103,000
Net reclassification from nonaccretable to accretable	0
Disposals	$0

Note_4_Loans_and_Allowance_for5

Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans (USD $)	Jun. 30, 2014	Dec. 31, 2013
Nonperforming Loans [Abstract]	'	'
Loans past due 90 days or more still accruing interest	$0	$0
Nonaccrual loans	5,741,000	6,718,000
Total nonperforming originated loans	$5,741,000	$6,718,000

Note_4_Loans_and_Allowance_for6

Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded Principal Balance of Nonaccrual Loans (USD $)	Jun. 30, 2014	Dec. 31, 2013
Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded Principal Balance of Nonaccrual Loans [Line Items]	'	'
Nonaccrual loans	$5,741,000	$6,718,000
Commercial and Industrial [Member]	'	'
Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded Principal Balance of Nonaccrual Loans [Line Items]	'	'
Nonaccrual loans	824,000	1,501,000
Commercial Vacant Land and Land Development and Residential Construction Loan [Member]	'	'
Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded Principal Balance of Nonaccrual Loans [Line Items]	'	'
Nonaccrual loans	235,000	785,000
Commercial Real Estate Owner Occupied Loan [Member]	'	'
Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded Principal Balance of Nonaccrual Loans [Line Items]	'	'
Nonaccrual loans	640,000	389,000
Commercial Real Estate Non Owner Occupied Loan [Member]	'	'
Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded Principal Balance of Nonaccrual Loans [Line Items]	'	'
Nonaccrual loans	129,000	168,000
Commercial Real Estate Multi Family and Residential Rental Loan [Member]	'	'
Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded Principal Balance of Nonaccrual Loans [Line Items]	'	'
Nonaccrual loans	470,000	208,000
Commercial Portfolio Segment [Member]	'	'
Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded Principal Balance of Nonaccrual Loans [Line Items]	'	'
Nonaccrual loans	2,298,000	3,051,000
Retail Home Equity and Other [Member]	'	'
Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded Principal Balance of Nonaccrual Loans [Line Items]	'	'
Nonaccrual loans	772,000	788,000
Retail 1-4 Family Mortgages [Member]	'	'
Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded Principal Balance of Nonaccrual Loans [Line Items]	'	'
Nonaccrual loans	2,671,000	2,879,000
Retail Loan [Member]	'	'
Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded Principal Balance of Nonaccrual Loans [Line Items]	'	'
Nonaccrual loans	$3,443,000	$3,667,000

Note_4_Loans_and_Allowance_for7

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	'

Note_4_Loans_and_Allowance_for8

Note 4 - Loans and Allowance for Loan Losses (Details) - Impaired Loans (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Commercial:	'	'	'	'
Loans with no allowance recorded, unpaid contractual principle balance	$5,224,000	$17,634,000	$5,224,000	$17,634,000
Loans with no allowance recorded, recorded principle balance	2,552,000	10,522,000	2,552,000	10,522,000
Loans with no allowance recorded, average recorded principle balance	3,404,000	10,726,000	3,437,000	11,068,000
Commercial:	'	'	'	'
Loans an allowance recorded, unpaid contractual principle balance	28,781,000	44,000,000	28,781,000	44,000,000
Loans an allowance recorded, recorded principle balance	28,052,000	43,155,000	28,052,000	43,155,000
Related allowance	10,362,000	14,836,000	10,362,000	14,836,000
Loans an allowance recorded, average recorded principle balance	28,597,000	41,963,000	30,187,000	43,151,000
Total impaired loans:	'	'	'	'
Loans, unpaid contractual principle balance	34,005,000	61,634,000	34,005,000	61,634,000
Loans, recorded principle balance	30,604,000	53,677,000	30,604,000	53,677,000
Related allowance	10,362,000	14,836,000	10,362,000	14,836,000
Loans, average recorded principle balance	32,001,000	52,689,000	33,624,000	54,219,000
Commercial and Industrial [Member]	'	'	'	'
Commercial:	'	'	'	'
Loans with no allowance recorded, unpaid contractual principle balance	1,620,000	2,793,000	1,620,000	2,793,000
Loans with no allowance recorded, recorded principle balance	132,000	1,277,000	132,000	1,277,000
Loans with no allowance recorded, average recorded principle balance	169,000	1,416,000	283,000	1,483,000
Commercial:	'	'	'	'
Loans an allowance recorded, unpaid contractual principle balance	939,000	1,708,000	939,000	1,708,000
Loans an allowance recorded, recorded principle balance	810,000	1,587,000	810,000	1,587,000
Related allowance	322,000	1,154,000	322,000	1,154,000
Loans an allowance recorded, average recorded principle balance	882,000	2,046,000	1,068,000	2,006,000
Total impaired loans:	'	'	'	'
Related allowance	322,000	1,154,000	322,000	1,154,000
Commercial Vacant Land and Land Development and Residential Construction Loan [Member]	'	'	'	'
Commercial:	'	'	'	'
Loans with no allowance recorded, unpaid contractual principle balance	0	1,543,000	0	1,543,000
Loans with no allowance recorded, recorded principle balance	0	1,010,000	0	1,010,000
Loans with no allowance recorded, average recorded principle balance	171,000	1,194,000	235,000	1,263,000
Commercial:	'	'	'	'
Loans an allowance recorded, unpaid contractual principle balance	3,614,000	5,058,000	3,614,000	5,058,000
Loans an allowance recorded, recorded principle balance	3,300,000	4,515,000	3,300,000	4,515,000
Related allowance	351,000	1,223,000	351,000	1,223,000
Loans an allowance recorded, average recorded principle balance	3,604,000	2,998,000	3,782,000	2,738,000
Total impaired loans:	'	'	'	'
Related allowance	351,000	1,223,000	351,000	1,223,000
Commercial Real Estate Owner Occupied Loan [Member]	'	'	'	'
Commercial:	'	'	'	'
Loans with no allowance recorded, unpaid contractual principle balance	1,171,000	2,020,000	1,171,000	2,020,000
Loans with no allowance recorded, recorded principle balance	640,000	1,383,000	640,000	1,383,000
Loans with no allowance recorded, average recorded principle balance	662,000	1,366,000	703,000	1,430,000
Commercial:	'	'	'	'
Loans an allowance recorded, unpaid contractual principle balance	2,460,000	2,402,000	2,460,000	2,402,000
Loans an allowance recorded, recorded principle balance	2,460,000	2,350,000	2,460,000	2,350,000
Related allowance	679,000	922,000	679,000	922,000
Loans an allowance recorded, average recorded principle balance	1,974,000	2,652,000	1,820,000	2,976,000
Total impaired loans:	'	'	'	'
Related allowance	679,000	922,000	679,000	922,000
Commercial Real Estate Non Owner Occupied Loan [Member]	'	'	'	'
Commercial:	'	'	'	'
Loans with no allowance recorded, unpaid contractual principle balance	578,000	8,067,000	578,000	8,067,000
Loans with no allowance recorded, recorded principle balance	577,000	5,194,000	577,000	5,194,000
Loans with no allowance recorded, average recorded principle balance	1,169,000	4,956,000	1,024,000	5,134,000
Commercial:	'	'	'	'
Loans an allowance recorded, unpaid contractual principle balance	17,753,000	29,249,000	17,753,000	29,249,000
Loans an allowance recorded, recorded principle balance	17,731,000	29,233,000	17,731,000	29,233,000
Related allowance	7,414,000	9,672,000	7,414,000	9,672,000
Loans an allowance recorded, average recorded principle balance	18,591,000	29,778,000	19,418,000	30,840,000
Total impaired loans:	'	'	'	'
Related allowance	7,414,000	9,672,000	7,414,000	9,672,000
Commercial Real Estate Multi Family and Residential Rental Loan [Member]	'	'	'	'
Commercial:	'	'	'	'
Loans with no allowance recorded, unpaid contractual principle balance	41,000	1,468,000	41,000	1,468,000
Loans with no allowance recorded, recorded principle balance	0	514,000	0	514,000
Loans with no allowance recorded, average recorded principle balance	1,000	599,000	1,000	537,000
Commercial:	'	'	'	'
Loans an allowance recorded, unpaid contractual principle balance	1,677,000	2,589,000	1,677,000	2,589,000
Loans an allowance recorded, recorded principle balance	1,549,000	2,527,000	1,549,000	2,527,000
Related allowance	674,000	835,000	674,000	835,000
Loans an allowance recorded, average recorded principle balance	1,319,000	2,609,000	1,774,000	3,047,000
Total impaired loans:	'	'	'	'
Related allowance	674,000	835,000	674,000	835,000
Commercial Portfolio Segment [Member]	'	'	'	'
Commercial:	'	'	'	'
Loans with no allowance recorded, unpaid contractual principle balance	3,410,000	15,891,000	3,410,000	15,891,000
Loans with no allowance recorded, recorded principle balance	1,349,000	9,378,000	1,349,000	9,378,000
Loans with no allowance recorded, average recorded principle balance	2,172,000	9,531,000	2,246,000	9,847,000
Commercial:	'	'	'	'
Loans an allowance recorded, unpaid contractual principle balance	26,443,000	41,006,000	26,443,000	41,006,000
Loans an allowance recorded, recorded principle balance	25,850,000	40,212,000	25,850,000	40,212,000
Related allowance	9,440,000	13,806,000	9,440,000	13,806,000
Loans an allowance recorded, average recorded principle balance	26,370,000	40,083,000	27,862,000	41,607,000
Total impaired loans:	'	'	'	'
Loans, unpaid contractual principle balance	29,853,000	56,897,000	29,853,000	56,897,000
Loans, recorded principle balance	27,199,000	49,590,000	27,199,000	49,590,000
Related allowance	9,440,000	13,806,000	9,440,000	13,806,000
Loans, average recorded principle balance	28,542,000	49,614,000	30,108,000	51,454,000
Retail Home Equity and Other [Member]	'	'	'	'
Commercial:	'	'	'	'
Loans with no allowance recorded, unpaid contractual principle balance	707,000	508,000	707,000	508,000
Loans with no allowance recorded, recorded principle balance	644,000	468,000	644,000	468,000
Loans with no allowance recorded, average recorded principle balance	647,000	474,000	585,000	477,000
Commercial:	'	'	'	'
Loans an allowance recorded, unpaid contractual principle balance	118,000	350,000	118,000	350,000
Loans an allowance recorded, recorded principle balance	90,000	324,000	90,000	324,000
Related allowance	90,000	134,000	90,000	134,000
Loans an allowance recorded, average recorded principle balance	91,000	335,000	157,000	355,000
Total impaired loans:	'	'	'	'
Related allowance	90,000	134,000	90,000	134,000
Retail 1-4 Family Mortgages [Member]	'	'	'	'
Commercial:	'	'	'	'
Loans with no allowance recorded, unpaid contractual principle balance	1,107,000	1,235,000	1,107,000	1,235,000
Loans with no allowance recorded, recorded principle balance	559,000	676,000	559,000	676,000
Loans with no allowance recorded, average recorded principle balance	585,000	721,000	606,000	744,000
Commercial:	'	'	'	'
Loans an allowance recorded, unpaid contractual principle balance	2,220,000	2,644,000	2,220,000	2,644,000
Loans an allowance recorded, recorded principle balance	2,112,000	2,619,000	2,112,000	2,619,000
Related allowance	832,000	896,000	832,000	896,000
Loans an allowance recorded, average recorded principle balance	2,136,000	1,545,000	2,168,000	1,189,000
Total impaired loans:	'	'	'	'
Related allowance	832,000	896,000	832,000	896,000
Retail Loan [Member]	'	'	'	'
Commercial:	'	'	'	'
Loans with no allowance recorded, unpaid contractual principle balance	1,814,000	1,743,000	1,814,000	1,743,000
Loans with no allowance recorded, recorded principle balance	1,203,000	1,144,000	1,203,000	1,144,000
Loans with no allowance recorded, average recorded principle balance	1,232,000	1,195,000	1,191,000	1,221,000
Commercial:	'	'	'	'
Loans an allowance recorded, unpaid contractual principle balance	2,338,000	2,994,000	2,338,000	2,994,000
Loans an allowance recorded, recorded principle balance	2,202,000	2,943,000	2,202,000	2,943,000
Related allowance	922,000	1,030,000	922,000	1,030,000
Loans an allowance recorded, average recorded principle balance	2,227,000	1,880,000	2,325,000	1,544,000
Total impaired loans:	'	'	'	'
Loans, unpaid contractual principle balance	4,152,000	4,737,000	4,152,000	4,737,000
Loans, recorded principle balance	3,405,000	4,087,000	3,405,000	4,087,000
Related allowance	922,000	1,030,000	922,000	1,030,000
Loans, average recorded principle balance	$3,459,000	$3,075,000	$3,516,000	$2,765,000

Note_4_Loans_and_Allowance_for9

Note 4 - Loans and Allowance for Loan Losses (Details) - Loans by Credit Quality Indicators (USD $)	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013
Internal credit risk grade groupings:	'	'	'
Loans	$2,073,482,000	$1,053,243,000	'
Originated Loan [Member] | Commercial and Industrial [Member] | Grade 1 - 4 [Member]	'	'	'
Internal credit risk grade groupings:	'	'	'
Loans	220,771,000	208,151,000	'
Originated Loan [Member] | Commercial and Industrial [Member] | Grade 5 - 7 [Member]	'	'	'
Internal credit risk grade groupings:	'	'	'
Loans	120,587,000	76,237,000	'
Originated Loan [Member] | Commercial and Industrial [Member] | Grade 8 - 9 [Member]	'	'	'
Internal credit risk grade groupings:	'	'	'
Loans	1,017,000	1,985,000	'
Originated Loan [Member] | Commercial and Industrial [Member]	'	'	'
Internal credit risk grade groupings:	'	'	'
Loans	342,375,000	286,373,000	'
Originated Loan [Member] | Commercial Vacant Land and Land Development and Residential Construction Loan [Member] | Grade 1 - 4 [Member]	'	'	'
Internal credit risk grade groupings:	'	'	'
Loans	7,310,000	6,973,000	'
Originated Loan [Member] | Commercial Vacant Land and Land Development and Residential Construction Loan [Member] | Grade 5 - 7 [Member]	'	'	'
Internal credit risk grade groupings:	'	'	'
Loans	21,604,000	25,535,000	'
Originated Loan [Member] | Commercial Vacant Land and Land Development and Residential Construction Loan [Member] | Grade 8 - 9 [Member]	'	'	'
Internal credit risk grade groupings:	'	'	'
Loans	3,300,000	4,233,000	'
Originated Loan [Member] | Commercial Vacant Land and Land Development and Residential Construction Loan [Member]	'	'	'
Internal credit risk grade groupings:	'	'	'
Loans	32,214,000	36,741,000	'
Originated Loan [Member] | Commercial Real Estate Owner Occupied Loan [Member] | Grade 1 - 4 [Member]	'	'	'
Internal credit risk grade groupings:	'	'	'
Loans	163,184,000	156,230,000	'
Originated Loan [Member] | Commercial Real Estate Owner Occupied Loan [Member] | Grade 5 - 7 [Member]	'	'	'
Internal credit risk grade groupings:	'	'	'
Loans	97,802,000	103,066,000	'
Originated Loan [Member] | Commercial Real Estate Owner Occupied Loan [Member] | Grade 8 - 9 [Member]	'	'	'
Internal credit risk grade groupings:	'	'	'
Loans	3,610,000	2,581,000	'
Originated Loan [Member] | Commercial Real Estate Owner Occupied Loan [Member]	'	'	'
Internal credit risk grade groupings:	'	'	'
Loans	264,596,000	261,877,000	'
Originated Loan [Member] | Commercial Real Estate Non Owner Occupied Loan [Member] | Grade 1 - 4 [Member]	'	'	'
Internal credit risk grade groupings:	'	'	'
Loans	253,470,000	219,325,000	'
Originated Loan [Member] | Commercial Real Estate Non Owner Occupied Loan [Member] | Grade 5 - 7 [Member]	'	'	'
Internal credit risk grade groupings:	'	'	'
Loans	132,604,000	122,717,000	'
Originated Loan [Member] | Commercial Real Estate Non Owner Occupied Loan [Member] | Grade 8 - 9 [Member]	'	'	'
Internal credit risk grade groupings:	'	'	'
Loans	13,781,000	22,024,000	'
Originated Loan [Member] | Commercial Real Estate Non Owner Occupied Loan [Member]	'	'	'
Internal credit risk grade groupings:	'	'	'
Loans	399,855,000	364,066,000	'
Originated Loan [Member] | Commercial Real Estate Multi Family and Residential Rental Loan [Member] | Grade 1 - 4 [Member]	'	'	'
Internal credit risk grade groupings:	'	'	'
Loans	17,258,000	15,465,000	'
Originated Loan [Member] | Commercial Real Estate Multi Family and Residential Rental Loan [Member] | Grade 5 - 7 [Member]	'	'	'
Internal credit risk grade groupings:	'	'	'
Loans	18,745,000	19,469,000	'
Originated Loan [Member] | Commercial Real Estate Multi Family and Residential Rental Loan [Member] | Grade 8 - 9 [Member]	'	'	'
Internal credit risk grade groupings:	'	'	'
Loans	1,566,000	2,705,000	'
Originated Loan [Member] | Commercial Real Estate Multi Family and Residential Rental Loan [Member]	'	'	'
Internal credit risk grade groupings:	'	'	'
Loans	37,569,000	37,639,000	'
Originated Loan [Member]	'	'	'
Internal credit risk grade groupings:	'	'	'
Loans	1,145,097,000	1,053,243,000	1,058,662,000
Acquired Loan [Member] | Commercial and Industrial [Member] | Grade 1 - 4 [Member]	'	'	'
Internal credit risk grade groupings:	'	'	'
Loans	111,223,000	'	'
Acquired Loan [Member] | Commercial and Industrial [Member] | Grade 5 - 7 [Member]	'	'	'
Internal credit risk grade groupings:	'	'	'
Loans	154,550,000	'	'
Acquired Loan [Member] | Commercial and Industrial [Member] | Grade 8 - 9 [Member]	'	'	'
Internal credit risk grade groupings:	'	'	'
Loans	7,911,000	'	'
Acquired Loan [Member] | Commercial and Industrial [Member]	'	'	'
Internal credit risk grade groupings:	'	'	'
Loans	273,684,000	0	'
Acquired Loan [Member] | Commercial Vacant Land and Land Development and Residential Construction Loan [Member] | Grade 1 - 4 [Member]	'	'	'
Internal credit risk grade groupings:	'	'	'
Loans	4,240,000	'	'
Acquired Loan [Member] | Commercial Vacant Land and Land Development and Residential Construction Loan [Member] | Grade 5 - 7 [Member]	'	'	'
Internal credit risk grade groupings:	'	'	'
Loans	15,552,000	'	'
Acquired Loan [Member] | Commercial Vacant Land and Land Development and Residential Construction Loan [Member] | Grade 8 - 9 [Member]	'	'	'
Internal credit risk grade groupings:	'	'	'
Loans	1,299,000	'	'
Acquired Loan [Member] | Commercial Vacant Land and Land Development and Residential Construction Loan [Member]	'	'	'
Internal credit risk grade groupings:	'	'	'
Loans	21,091,000	0	'
Acquired Loan [Member] | Commercial Real Estate Owner Occupied Loan [Member] | Grade 1 - 4 [Member]	'	'	'
Internal credit risk grade groupings:	'	'	'
Loans	28,670,000	'	'
Acquired Loan [Member] | Commercial Real Estate Owner Occupied Loan [Member] | Grade 5 - 7 [Member]	'	'	'
Internal credit risk grade groupings:	'	'	'
Loans	83,142,000	'	'
Acquired Loan [Member] | Commercial Real Estate Owner Occupied Loan [Member] | Grade 8 - 9 [Member]	'	'	'
Internal credit risk grade groupings:	'	'	'
Loans	8,006,000	'	'
Acquired Loan [Member] | Commercial Real Estate Owner Occupied Loan [Member]	'	'	'
Internal credit risk grade groupings:	'	'	'
Loans	119,818,000	0	'
Acquired Loan [Member] | Commercial Real Estate Non Owner Occupied Loan [Member] | Grade 1 - 4 [Member]	'	'	'
Internal credit risk grade groupings:	'	'	'
Loans	44,344,000	'	'
Acquired Loan [Member] | Commercial Real Estate Non Owner Occupied Loan [Member] | Grade 5 - 7 [Member]	'	'	'
Internal credit risk grade groupings:	'	'	'
Loans	100,032,000	'	'
Acquired Loan [Member] | Commercial Real Estate Non Owner Occupied Loan [Member] | Grade 8 - 9 [Member]	'	'	'
Internal credit risk grade groupings:	'	'	'
Loans	5,058,000	'	'
Acquired Loan [Member] | Commercial Real Estate Non Owner Occupied Loan [Member]	'	'	'
Internal credit risk grade groupings:	'	'	'
Loans	149,434,000	0	'
Acquired Loan [Member] | Commercial Real Estate Multi Family and Residential Rental Loan [Member] | Grade 1 - 4 [Member]	'	'	'
Internal credit risk grade groupings:	'	'	'
Loans	19,438,000	'	'
Acquired Loan [Member] | Commercial Real Estate Multi Family and Residential Rental Loan [Member] | Grade 5 - 7 [Member]	'	'	'
Internal credit risk grade groupings:	'	'	'
Loans	27,051,000	'	'
Acquired Loan [Member] | Commercial Real Estate Multi Family and Residential Rental Loan [Member] | Grade 8 - 9 [Member]	'	'	'
Internal credit risk grade groupings:	'	'	'
Loans	610,000	'	'
Acquired Loan [Member] | Commercial Real Estate Multi Family and Residential Rental Loan [Member]	'	'	'
Internal credit risk grade groupings:	'	'	'
Loans	47,099,000	0	'
Acquired Loan [Member]	'	'	'
Internal credit risk grade groupings:	'	'	'
Loans	928,385,000	0	'
Commercial and Industrial [Member]	'	'	'
Internal credit risk grade groupings:	'	'	'
Loans	616,059,000	286,373,000	'
Commercial Vacant Land and Land Development and Residential Construction Loan [Member]	'	'	'
Internal credit risk grade groupings:	'	'	'
Loans	53,305,000	36,741,000	'
Commercial Real Estate Owner Occupied Loan [Member]	'	'	'
Internal credit risk grade groupings:	'	'	'
Loans	384,414,000	261,877,000	'
Commercial Real Estate Non Owner Occupied Loan [Member]	'	'	'
Internal credit risk grade groupings:	'	'	'
Loans	549,289,000	364,066,000	'
Commercial Real Estate Multi Family and Residential Rental Loan [Member]	'	'	'
Internal credit risk grade groupings:	'	'	'
Loans	$84,668,000	$37,639,000	'

Recovered_Sheet1

Note 4 - Loans and Allowance for Loan Losses (Details) - Retail Credit Risk by Collateral Type (USD $)	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Loans	$2,073,482,000	$1,053,243,000	'
Originated Loan [Member] | Retail Home Equity and Other [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Loans	35,151,000	35,080,000	'
Originated Loan [Member] | Retail 1-4 Family Mortgages [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Loans	33,337,000	31,467,000	'
Originated Loan [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Loans	1,145,097,000	1,053,243,000	1,058,662,000
Acquired Loan [Member] | Retail Home Equity and Other [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Loans	134,557,000	0	'
Acquired Loan [Member] | Retail 1-4 Family Mortgages [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Loans	182,702,000	0	'
Acquired Loan [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Loans	928,385,000	0	'
Retail Home Equity and Other [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Loans	169,708,000	35,080,000	'
Retail 1-4 Family Mortgages [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Loans	$216,039,000	$31,467,000	'

Recovered_Sheet2

Note 4 - Loans and Allowance for Loan Losses (Details) - Activity in Allowance for Loan Losses and the Recorded Investments in Loans (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Allowance for loan losses:	'	'	'	'	'
Provision for loan losses	($700,000)	($1,500,000)	($2,600,000)	($3,000,000)	'
Total loans:	'	'	'	'	'
Loans	2,073,482,000	'	2,073,482,000	'	1,053,243,000
Originated Loan [Member] | Commercial Portfolio Segment [Member]	'	'	'	'	'
Allowance for loan losses:	'	'	'	'	'
Allowance for loan losses	19,001,000	23,717,000	20,455,000	26,043,000	'
Allowance for loan losses: individually evaluated for impairment	9,440,000	13,806,000	9,440,000	13,806,000	'
Allowance for loan losses: collectively evaluated for impairment	9,667,000	8,576,000	9,667,000	8,576,000	'
Provision for loan losses	-334,000	-1,480,000	-1,788,000	-2,644,000	'
Charge-offs	-98,000	-363,000	-684,000	-2,775,000	'
Recoveries	538,000	508,000	1,124,000	1,758,000	'
Allowance for loan losses	19,107,000	22,382,000	19,107,000	22,382,000	'
Total loans:	'	'	'	'	'
Loans	1,076,609,000	985,616,000	1,076,609,000	985,616,000	986,696,000
Loans: individually evaluated for impairment	27,199,000	49,590,000	27,199,000	49,590,000	'
Loans: collectively evaluated for impairment	1,049,410,000	936,026,000	1,049,410,000	936,026,000	'
Originated Loan [Member] | Retail Loan [Member]	'	'	'	'	'
Allowance for loan losses:	'	'	'	'	'
Allowance for loan losses	1,957,000	2,302,000	2,358,000	2,645,000	'
Allowance for loan losses: individually evaluated for impairment	922,000	1,030,000	922,000	1,030,000	'
Allowance for loan losses: collectively evaluated for impairment	852,000	1,529,000	852,000	1,529,000	'
Provision for loan losses	-345,000	-10,000	-779,000	-373,000	'
Charge-offs	-5,000	-19,000	-7,000	-22,000	'
Recoveries	167,000	286,000	202,000	309,000	'
Allowance for loan losses	1,774,000	2,559,000	1,774,000	2,559,000	'
Total loans:	'	'	'	'	'
Loans	68,488,000	73,046,000	68,488,000	73,046,000	66,547,000
Loans: individually evaluated for impairment	3,405,000	4,087,000	3,405,000	4,087,000	'
Loans: collectively evaluated for impairment	65,083,000	68,959,000	65,083,000	68,959,000	'
Originated Loan [Member] | Unallocated Financing Receivables [Member]	'	'	'	'	'
Allowance for loan losses:	'	'	'	'	'
Allowance for loan losses	-4,000	16,000	8,000	-11,000	'
Allowance for loan losses: individually evaluated for impairment	0	0	0	0	'
Allowance for loan losses: collectively evaluated for impairment	-25,000	6,000	-25,000	6,000	'
Provision for loan losses	-21,000	-10,000	-33,000	17,000	'
Charge-offs	0	0	0	0	'
Recoveries	0	0	0	0	'
Allowance for loan losses	-25,000	6,000	-25,000	6,000	'
Originated Loan [Member]	'	'	'	'	'
Allowance for loan losses:	'	'	'	'	'
Allowance for loan losses	20,954,000	26,035,000	22,821,000	28,677,000	'
Allowance for loan losses: individually evaluated for impairment	10,362,000	14,836,000	10,362,000	14,836,000	'
Allowance for loan losses: collectively evaluated for impairment	10,494,000	10,111,000	10,494,000	10,111,000	'
Provision for loan losses	-700,000	-1,500,000	-2,600,000	-3,000,000	'
Charge-offs	-103,000	-382,000	-691,000	-2,797,000	'
Recoveries	705,000	794,000	1,326,000	2,067,000	'
Allowance for loan losses	20,856,000	24,947,000	20,856,000	24,947,000	'
Total loans:	'	'	'	'	'
Loans	1,145,097,000	1,058,662,000	1,145,097,000	1,058,662,000	1,053,243,000
Loans: individually evaluated for impairment	30,604,000	53,677,000	30,604,000	53,677,000	'
Loans: collectively evaluated for impairment	1,114,493,000	1,004,985,000	1,114,493,000	1,004,985,000	'
Commercial Portfolio Segment [Member]	'	'	'	'	'
Total loans:	'	'	'	'	'
Loans	1,687,735,000	'	1,687,735,000	'	986,696,000
Retail Loan [Member]	'	'	'	'	'
Total loans:	'	'	'	'	'
Loans	$385,747,000	'	$385,747,000	'	$66,547,000

Recovered_Sheet3

Note 4 - Loans and Allowance for Loan Losses (Details) - Loans Modified as Troubled Debt Restructurings (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Commercial:	'	'	'	'
Loans modified, number of contracts	1	'	3	'
Loans modified, pre-modification recorded principal balance	$996,000	'	$1,156,000	'
Loans modified, post-modification recorded principal balance	996,000	'	1,156,000	'
Commercial and Industrial [Member] | Originated Loan [Member]	'	'	'	'
Commercial:	'	'	'	'
Loans modified, number of contracts	0	1	1	1
Loans modified, pre-modification recorded principal balance	0	60,000	14,000	60,000
Loans modified, post-modification recorded principal balance	0	60,000	14,000	60,000
Commercial and Industrial [Member] | Acquired Loan [Member]	'	'	'	'
Commercial:	'	'	'	'
Loans modified, number of contracts	0	'	0	'
Loans modified, pre-modification recorded principal balance	0	'	0	'
Loans modified, post-modification recorded principal balance	0	'	0	'
Commercial and Industrial [Member]	'	'	'	'
Commercial:	'	'	'	'
Loans modified, number of contracts	0	'	1	'
Loans modified, pre-modification recorded principal balance	0	'	14,000	'
Loans modified, post-modification recorded principal balance	0	'	14,000	'
Commercial Vacant Land and Land Development and Residential Construction Loan [Member] | Originated Loan [Member]	'	'	'	'
Commercial:	'	'	'	'
Loans modified, number of contracts	0	2	0	2
Loans modified, pre-modification recorded principal balance	0	3,247,000	0	3,247,000
Loans modified, post-modification recorded principal balance	0	3,247,000	0	3,247,000
Commercial Vacant Land and Land Development and Residential Construction Loan [Member] | Acquired Loan [Member]	'	'	'	'
Commercial:	'	'	'	'
Loans modified, number of contracts	0	'	0	'
Loans modified, pre-modification recorded principal balance	0	'	0	'
Loans modified, post-modification recorded principal balance	0	'	0	'
Commercial Vacant Land and Land Development and Residential Construction Loan [Member]	'	'	'	'
Commercial:	'	'	'	'
Loans modified, number of contracts	0	'	0	'
Loans modified, pre-modification recorded principal balance	0	'	0	'
Loans modified, post-modification recorded principal balance	0	'	0	'
Commercial Real Estate Owner Occupied Loan [Member] | Originated Loan [Member]	'	'	'	'
Commercial:	'	'	'	'
Loans modified, number of contracts	1	2	1	3
Loans modified, pre-modification recorded principal balance	996,000	680,000	996,000	904,000
Loans modified, post-modification recorded principal balance	996,000	680,000	996,000	904,000
Commercial Real Estate Owner Occupied Loan [Member] | Acquired Loan [Member]	'	'	'	'
Commercial:	'	'	'	'
Loans modified, number of contracts	0	'	0	'
Loans modified, pre-modification recorded principal balance	0	'	0	'
Loans modified, post-modification recorded principal balance	0	'	0	'
Commercial Real Estate Owner Occupied Loan [Member]	'	'	'	'
Commercial:	'	'	'	'
Loans modified, number of contracts	1	'	1	'
Loans modified, pre-modification recorded principal balance	996,000	'	996,000	'
Loans modified, post-modification recorded principal balance	996,000	'	996,000	'
Commercial Real Estate Non Owner Occupied Loan [Member] | Originated Loan [Member]	'	'	'	'
Commercial:	'	'	'	'
Loans modified, number of contracts	0	0	1	2
Loans modified, pre-modification recorded principal balance	0	0	146,000	2,068,000
Loans modified, post-modification recorded principal balance	0	0	146,000	2,068,000
Commercial Real Estate Non Owner Occupied Loan [Member] | Acquired Loan [Member]	'	'	'	'
Commercial:	'	'	'	'
Loans modified, number of contracts	0	'	0	'
Loans modified, pre-modification recorded principal balance	0	'	0	'
Loans modified, post-modification recorded principal balance	0	'	0	'
Commercial Real Estate Non Owner Occupied Loan [Member]	'	'	'	'
Commercial:	'	'	'	'
Loans modified, number of contracts	0	'	1	'
Loans modified, pre-modification recorded principal balance	0	'	146,000	'
Loans modified, post-modification recorded principal balance	0	'	146,000	'
Commercial Real Estate Multi Family and Residential Rental Loan [Member] | Originated Loan [Member]	'	'	'	'
Commercial:	'	'	'	'
Loans modified, number of contracts	0	0	0	0
Loans modified, pre-modification recorded principal balance	0	0	0	0
Loans modified, post-modification recorded principal balance	0	0	0	0
Commercial Real Estate Multi Family and Residential Rental Loan [Member] | Acquired Loan [Member]	'	'	'	'
Commercial:	'	'	'	'
Loans modified, number of contracts	0	'	0	'
Loans modified, pre-modification recorded principal balance	0	'	0	'
Loans modified, post-modification recorded principal balance	0	'	0	'
Commercial Real Estate Multi Family and Residential Rental Loan [Member]	'	'	'	'
Commercial:	'	'	'	'
Loans modified, number of contracts	0	'	0	'
Loans modified, pre-modification recorded principal balance	0	'	0	'
Loans modified, post-modification recorded principal balance	0	'	0	'
Commercial Portfolio Segment [Member] | Originated Loan [Member]	'	'	'	'
Commercial:	'	'	'	'
Loans modified, number of contracts	1	5	3	8
Loans modified, pre-modification recorded principal balance	996,000	3,987,000	1,156,000	6,279,000
Loans modified, post-modification recorded principal balance	996,000	3,987,000	1,156,000	6,279,000
Commercial Portfolio Segment [Member] | Acquired Loan [Member]	'	'	'	'
Commercial:	'	'	'	'
Loans modified, number of contracts	0	'	0	'
Loans modified, pre-modification recorded principal balance	0	'	0	'
Loans modified, post-modification recorded principal balance	0	'	0	'
Commercial Portfolio Segment [Member]	'	'	'	'
Commercial:	'	'	'	'
Loans modified, number of contracts	1	'	3	'
Loans modified, pre-modification recorded principal balance	996,000	'	1,156,000	'
Loans modified, post-modification recorded principal balance	996,000	'	1,156,000	'
Retail Home Equity and Other [Member] | Originated Loan [Member]	'	'	'	'
Commercial:	'	'	'	'
Loans modified, number of contracts	0	0	0	0
Loans modified, pre-modification recorded principal balance	0	0	0	0
Loans modified, post-modification recorded principal balance	0	0	0	0
Retail Home Equity and Other [Member] | Acquired Loan [Member]	'	'	'	'
Commercial:	'	'	'	'
Loans modified, number of contracts	0	'	0	'
Loans modified, pre-modification recorded principal balance	0	'	0	'
Loans modified, post-modification recorded principal balance	0	'	0	'
Retail Home Equity and Other [Member]	'	'	'	'
Commercial:	'	'	'	'
Loans modified, number of contracts	0	'	0	'
Loans modified, pre-modification recorded principal balance	0	'	0	'
Loans modified, post-modification recorded principal balance	0	'	0	'
Retail 1-4 Family Mortgages [Member] | Originated Loan [Member]	'	'	'	'
Commercial:	'	'	'	'
Loans modified, number of contracts	0	1	0	1
Loans modified, pre-modification recorded principal balance	0	1,879,000	0	1,879,000
Loans modified, post-modification recorded principal balance	0	1,879,000	0	1,879,000
Retail 1-4 Family Mortgages [Member] | Acquired Loan [Member]	'	'	'	'
Commercial:	'	'	'	'
Loans modified, number of contracts	0	'	0	'
Loans modified, pre-modification recorded principal balance	0	'	0	'
Loans modified, post-modification recorded principal balance	0	'	0	'
Retail 1-4 Family Mortgages [Member]	'	'	'	'
Commercial:	'	'	'	'
Loans modified, number of contracts	0	'	0	'
Loans modified, pre-modification recorded principal balance	0	'	0	'
Loans modified, post-modification recorded principal balance	0	'	0	'
Retail Loan [Member] | Originated Loan [Member]	'	'	'	'
Commercial:	'	'	'	'
Loans modified, number of contracts	0	1	0	1
Loans modified, pre-modification recorded principal balance	0	1,879,000	0	1,879,000
Loans modified, post-modification recorded principal balance	0	1,879,000	0	1,879,000
Retail Loan [Member] | Acquired Loan [Member]	'	'	'	'
Commercial:	'	'	'	'
Loans modified, number of contracts	0	'	0	'
Loans modified, pre-modification recorded principal balance	0	'	0	'
Loans modified, post-modification recorded principal balance	0	'	0	'
Retail Loan [Member]	'	'	'	'
Commercial:	'	'	'	'
Loans modified, number of contracts	0	'	0	'
Loans modified, pre-modification recorded principal balance	0	'	0	'
Loans modified, post-modification recorded principal balance	0	'	0	'
Originated Loan [Member]	'	'	'	'
Commercial:	'	'	'	'
Loans modified, number of contracts	1	6	3	9
Loans modified, pre-modification recorded principal balance	996,000	5,866,000	1,156,000	8,158,000
Loans modified, post-modification recorded principal balance	996,000	5,866,000	1,156,000	8,158,000
Acquired Loan [Member]	'	'	'	'
Commercial:	'	'	'	'
Loans modified, number of contracts	0	'	0	'
Loans modified, pre-modification recorded principal balance	0	'	0	'
Loans modified, post-modification recorded principal balance	$0	'	$0	'

Recovered_Sheet4

Note 4 - Loans and Allowance for Loan Losses (Details) - Loans Modified as Troubled Debt Restructurings Within the Previous Twelve Months That Became Over 30 Days Past Due (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Commercial:	'	'	'	'
Loans modified, over 30 days past due, number of contracts	0	0	0	0
Loans modified, over 30 days past due, recorded principal balance	$0	$0	$0	$0
Commercial and Industrial [Member]	'	'	'	'
Commercial:	'	'	'	'
Loans modified, over 30 days past due, number of contracts	0	0	0	0
Loans modified, over 30 days past due, recorded principal balance	0	0	0	0
Commercial Vacant Land and Land Development and Residential Construction Loan [Member]	'	'	'	'
Commercial:	'	'	'	'
Loans modified, over 30 days past due, number of contracts	0	0	0	0
Loans modified, over 30 days past due, recorded principal balance	0	0	0	0
Commercial Real Estate Owner Occupied Loan [Member]	'	'	'	'
Commercial:	'	'	'	'
Loans modified, over 30 days past due, number of contracts	0	0	0	0
Loans modified, over 30 days past due, recorded principal balance	0	0	0	0
Commercial Real Estate Non Owner Occupied Loan [Member]	'	'	'	'
Commercial:	'	'	'	'
Loans modified, over 30 days past due, number of contracts	0	0	0	0
Loans modified, over 30 days past due, recorded principal balance	0	0	0	0
Commercial Real Estate Multi Family and Residential Rental Loan [Member]	'	'	'	'
Commercial:	'	'	'	'
Loans modified, over 30 days past due, number of contracts	0	0	0	0
Loans modified, over 30 days past due, recorded principal balance	0	0	0	0
Commercial Portfolio Segment [Member]	'	'	'	'
Commercial:	'	'	'	'
Loans modified, over 30 days past due, number of contracts	0	0	0	0
Loans modified, over 30 days past due, recorded principal balance	0	0	0	0
Retail Home Equity and Other [Member]	'	'	'	'
Commercial:	'	'	'	'
Loans modified, over 30 days past due, number of contracts	0	0	0	0
Loans modified, over 30 days past due, recorded principal balance	0	0	0	0
Retail 1-4 Family Mortgages [Member]	'	'	'	'
Commercial:	'	'	'	'
Loans modified, over 30 days past due, number of contracts	0	0	0	0
Loans modified, over 30 days past due, recorded principal balance	0	0	0	0
Retail Loan [Member]	'	'	'	'
Commercial:	'	'	'	'
Loans modified, over 30 days past due, number of contracts	0	0	0	0
Loans modified, over 30 days past due, recorded principal balance	$0	$0	$0	$0

Recovered_Sheet5

Note 4 - Loans and Allowance for Loan Losses (Details) - Activity for Troubled Debt Restructurings (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Commercial and Industrial [Member]	'	'	'	'
Commercial Loan Portfolio:	'	'	'	'
Balance	$1,404,000	$3,269,000	$1,656,000	$2,721,000
Charge-Offs	-67,000	0	-67,000	-34,000
Payments	-161,000	-1,063,000	-427,000	-1,578,000
Transfers to ORE	0	0	0	-74,000
Net Additions/Deletions	0	60,000	14,000	1,231,000
Balance	1,176,000	2,266,000	1,176,000	2,266,000
Commercial Vacant Land and Land Development and Residential Construction Loan [Member]	'	'	'	'
Commercial Loan Portfolio:	'	'	'	'
Balance	4,250,000	2,327,000	4,501,000	3,071,000
Charge-Offs	0	-30,000	0	-725,000
Payments	-464,000	-104,000	-3,613,000	-153,000
Transfers to ORE	0	0	0	0
Net Additions/Deletions	0	3,247,000	2,898,000	3,247,000
Balance	3,786,000	5,440,000	3,786,000	5,440,000
Commercial Real Estate Owner Occupied Loan [Member]	'	'	'	'
Commercial Loan Portfolio:	'	'	'	'
Balance	1,756,000	3,879,000	1,816,000	4,115,000
Charge-Offs	0	-70,000	-11,000	-70,000
Payments	-42,000	-979,000	-90,000	-1,039,000
Transfers to ORE	0	0	0	-363,000
Net Additions/Deletions	997,000	749,000	996,000	936,000
Balance	2,711,000	3,579,000	2,711,000	3,579,000
Commercial Real Estate Non Owner Occupied Loan [Member]	'	'	'	'
Commercial Loan Portfolio:	'	'	'	'
Balance	21,629,000	35,003,000	22,311,000	37,672,000
Charge-Offs	0	-5,000	0	-716,000
Payments	-2,965,000	-574,000	-3,966,000	-3,786,000
Transfers to ORE	0	0	0	-802,000
Net Additions/Deletions	0	0	319,000	2,056,000
Balance	18,664,000	34,424,000	18,664,000	34,424,000
Commercial Real Estate Multi Family and Residential Rental Loan [Member]	'	'	'	'
Commercial Loan Portfolio:	'	'	'	'
Balance	732,000	2,958,000	2,620,000	3,025,000
Charge-Offs	0	0	-420,000	-15,000
Payments	-13,000	-183,000	-1,481,000	-235,000
Transfers to ORE	0	0	0	0
Net Additions/Deletions	0	0	0	0
Balance	719,000	2,775,000	719,000	2,775,000
Retail Home Equity and Other [Member]	'	'	'	'
Commercial Loan Portfolio:	'	'	'	'
Balance	0	0	0	0
Charge-Offs	0	0	0	0
Payments	0	0	0	0
Transfers to ORE	0	0	0	0
Net Additions/Deletions	0	0	0	0
Balance	0	0	0	0
Retail 1-4 Family Mortgages [Member]	'	'	'	'
Commercial Loan Portfolio:	'	'	'	'
Balance	2,122,000	152,000	2,191,000	155,000
Charge-Offs	0	0	0	0
Payments	-45,000	-2,000	-114,000	-5,000
Transfers to ORE	0	0	0	0
Net Additions/Deletions	0	1,879,000	0	1,879,000
Balance	$2,077,000	$2,029,000	$2,077,000	$2,029,000

Recovered_Sheet6

Note 4 - Loans and Allowance for Loan Losses (Details) - Allowance Related to Troubled Debt Restructurings (USD $)	Jun. 30, 2014	Dec. 31, 2013
Commercial:	'	'
Allowance for losses, troubled debt restructurings	$8,864,000	$10,351,000
Commercial and Industrial [Member]	'	'
Commercial:	'	'
Allowance for losses, troubled debt restructurings	60,000	187,000
Commercial Vacant Land and Land Development and Residential Construction Loan [Member]	'	'
Commercial:	'	'
Allowance for losses, troubled debt restructurings	341,000	798,000
Commercial Real Estate Owner Occupied Loan [Member]	'	'
Commercial:	'	'
Allowance for losses, troubled debt restructurings	679,000	528,000
Commercial Real Estate Non Owner Occupied Loan [Member]	'	'
Commercial:	'	'
Allowance for losses, troubled debt restructurings	7,285,000	7,828,000
Commercial Real Estate Multi Family and Residential Rental Loan [Member]	'	'
Commercial:	'	'
Allowance for losses, troubled debt restructurings	499,000	1,010,000
Commercial Portfolio Segment [Member]	'	'
Commercial:	'	'
Allowance for losses, troubled debt restructurings	8,864,000	10,351,000
Retail Home Equity and Other [Member]	'	'
Commercial:	'	'
Allowance for losses, troubled debt restructurings	0	0
Retail 1-4 Family Mortgages [Member]	'	'
Commercial:	'	'
Allowance for losses, troubled debt restructurings	0	0
Retail Loan [Member]	'	'
Commercial:	'	'
Allowance for losses, troubled debt restructurings	$0	$0

Note_5_Premises_and_Equipment_2

Note 5 - Premises and Equipment, Net (Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Property, Plant and Equipment [Abstract]	'	'	'	'
Depreciation	$0.50	$0.30	$0.80	$0.70

Note_5_Premises_and_Equipment_3

Note 5 - Premises and Equipment, Net (Details) - Summary of Premises and Equipment (USD $)	Jun. 30, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]	'	'
Premises and equipment	$70,870,000	$46,007,000
Less: accumulated depreciation	21,867,000	21,109,000
Premises and equipment, net	49,003,000	24,898,000
Land, Buildings and Improvements [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Premises and equipment	55,352,000	33,289,000
Furniture and Fixtures [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Premises and equipment	$15,518,000	$12,718,000

Note_6_Deposits_Details

Note 6 - Deposits (Details) (USD $)	6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Disclosure Text Block [Abstract]	'	'
Deposits	$2,303,261,000	$1,118,911,000
Increase (Decrease) in Deposits	$1,180,000,000	'
Percentage of Increase in Aggregate Deposits	105.80%	'

Note_6_Deposits_Details_Summar

Note 6 - Deposits (Details) - Summary of Deposits (USD $)	6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Summary of Deposits [Abstract]	'	'
Noninterest-bearing checking (in Dollars)	$515,646,000	$224,580,000
Noninterest-bearing checking	22.40%	20.10%
Noninterest-bearing checking	129.60%	'
Interest-bearing checking (in Dollars)	424,362,000	197,388,000
Interest-bearing checking	18.40%	17.60%
Interest-bearing checking	115.00%	'
Money market (in Dollars)	237,798,000	133,369,000
Money market	10.30%	11.90%
Money market	78.30%	'
Savings (in Dollars)	341,924,000	52,606,000
Savings	14.80%	4.70%
Savings	550.00%	'
Time, under $100,000 (in Dollars)	208,417,000	43,251,000
Time, under $100,000	9.10%	3.90%
Time, under $100,000	381.90%	'
Time, $100,000 and over (in Dollars)	387,305,000	254,600,000
Time, $100,000 and over	16.80%	22.80%
Time, $100,000 and over	52.10%	'
(in Dollars)	2,115,452,000	905,794,000
	91.80%	81.00%
	133.50%	'
Out-of-area time, under $100,000 (in Dollars)	3,150,000	4,078,000
Out-of-area time, under $100,000	0.20%	0.40%
Out-of-area time, under $100,000	-22.80%	'
Out-of-area time, $100,000 and over (in Dollars)	184,659,000	209,039,000
Out-of-area time, $100,000 and over	8.00%	18.60%
Out-of-area time, $100,000 and over	-11.70%	'
(in Dollars)	187,809,000	213,117,000
	8.20%	19.00%
	-11.90%	'
Total deposits (in Dollars)	$2,303,261,000	$1,118,911,000
Total deposits	100.00%	100.00%
Total deposits	105.80%	'

Note_7_Securities_Sold_Under_A2

Note 7 - Securities Sold Under Agreements to Repurchase (Details) (Maximum [Member])	6 Months Ended
	Jun. 30, 2014
Maximum [Member]	'
Note 7 - Securities Sold Under Agreements to Repurchase (Details) [Line Items]	'
Repurchase Agreement Counterparty, Weighted Average Maturity of Agreements	'1 year

Note_7_Securities_Sold_Under_A3

Note 7 - Securities Sold Under Agreements to Repurchase (Details) - Securities Sold Under Agreement To Repurchase (USD $)	6 Months Ended	12 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Securities Sold Under Agreement To Repurchase [Abstract]	'	'
Outstanding balance at end of period	$124,108,000	$69,305,000
Average interest rate at end of period	0.10%	0.12%
Average daily balance during the period	79,003,000	65,939,000
Average interest rate during the period	0.12%	0.12%
Maximum daily balance during the period	$126,621,000	$78,960,000

Note_8_Federal_Home_Loan_Bank_2

Note 8 - Federal Home Loan Bank Advances (Details) (USD $)	6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Disclosure Text Block [Abstract]	'	'
Long-term Federal Home Loan Bank Advances (in Dollars)	$57,044,000	$45,000,000
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Interest Rate, Range from	0.41%	1.22%
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Interest Rate, Range to	1.51%	1.51%
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Weighted Average Interest Rate	1.21%	1.34%
Increase (Decrease) in Loans from Federal Home Loan Banks (in Dollars)	12,000,000	'
Line of Credit Facility, Maximum Borrowing Capacity (in Dollars)	570,000,000	'
Line of Credit Facility, Remaining Borrowing Capacity (in Dollars)	$509,000,000	'

Note_8_Federal_Home_Loan_Bank_3

Note 8 - Federal Home Loan Bank Advances (Details) - Maturities of Currently Outstanding FHLB Advances (USD $)	Jun. 30, 2014
Maturities of Currently Outstanding FHLB Advances [Abstract]	'
2014	$3,000,000
2015	6,000,000
2016	3,044,000
2017	45,000,000
2018	$0

Note_9_Stockbased_Compensation2

Note 9 - Stock-based Compensation (Details) (USD $)

0 Months Ended

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

6 Months Ended

6 Months Ended

0 Months Ended

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

1 Months Ended

Jun. 26, 2014

Jun. 30, 2014

Dec. 31, 2013

Dec. 31, 2011

Dec. 31, 2010

Dec. 31, 2009

Dec. 31, 2005

Dec. 31, 2012

Dec. 31, 2008

Dec. 31, 2007

Dec. 31, 2006

Jun. 30, 2014

Dec. 31, 2013

Dec. 31, 2012

Jun. 30, 2014

Dec. 31, 2013

Dec. 31, 2011

Dec. 31, 2010

Dec. 31, 2009

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 01, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 26, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Dec. 31, 2008

Dec. 31, 2007

Dec. 31, 2006

Jun. 30, 2014

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Jun. 30, 2014

31-May-14

Restricted Stock [Member]

Restricted Stock [Member]

Restricted Stock [Member]

Restricted Stock [Member]

Restricted Stock [Member]

Restricted Stock [Member]

Restricted Stock [Member]

Restricted Stock [Member]

Restricted Stock [Member]

Restricted Stock [Member]

Restricted Stock [Member]

Restricted Stock [Member]

Grants of Less Than 50 Shares [Member]

Grants of More Than 50 Shares [Member]

Firstbank Corporation [Member]

Firstbank Corporation [Member]

Firstbank Corporation [Member]

Firstbank Corporation [Member]

Director [Member]

2000 Employee Stock Option Plan [Member]

2004 Employee Stock Option Plan [Member]

Independent Director Stock Plan [Member]

Stock Incentive Plan of 2006 [Member]

Stock Incentive Plan of 2006 [Member]

Stock Incentive Plan of 2006 [Member]

Mercantile Plans [Member]

Mercantile Plans [Member]

Mercantile Plans [Member]

Mercantile Plans [Member]

Firstbank Plans [Member]

Firstbank Plans [Member]

Stock Incentive Plan of 2006 [Member]

Stock Incentive Plan of 2006 [Member]

Stock Incentive Plan of 2006 [Member]

Stock Incentive Plan of 2006 [Member]

Mercantile Plans [Member]

Mercantile Plans [Member]

Mercantile Plans [Member]

Firstbank Corporation [Member]

Firstbank Corporation [Member]

Minimum [Member]

Maximum [Member]

Note 9 - Stock-based Compensation (Details) [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares)

'

0

0

0

0

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

0

0

'

0

'

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in Shares)

'

'

'

'

'

'

'

'

'

'

'

0

0

66,100

0

0

0

0

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period

'

'

'

'

'

'

'21 days

'2 years

'4 years

'4 years

'4 years

'

'

'

'

'

'

'

'

'1 year

'5 years

'

'

'6 months

'18 months

'

'1 year

'1 year

'5 years

'2 years

'2 years

'2 years

'

'

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'10 years

'

'

'

'

'10 years

'10 years

'10 years

'7 years

'7 years

'7 years

'

'

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

125.00%

'

'

'

'

'

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in Shares)

'

'

384,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized (in Dollars)

'

$200,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Option Grant Vesting Threshold (in Shares)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

50

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

20.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number (in Shares)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

282,200

'

'

'

'

'

'

'

'

'

56,890

60,876

152,896

214,903

279,103

0

Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number (in Shares)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

258,400

'

'

'

'

'

'

'

'

'

56,890

60,876

152,896

'

255,373

'

Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number (in Shares)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

23,800

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options (in Dollars)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value (in Dollars)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

100,000

'

'

'

2,100,000

'

Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value (in Dollars)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

100,000

'

'

'

2,100,000

'

Stock Issued During Period, Shares, Issued for Services (in Shares)

7,375

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Deferred Compensation Arrangement with Individual, Allocated Share-based Compensation Expense (in Dollars)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$155,000

'

'

'

'

'

'

'

'

'

'

'

'

Note_9_Stockbased_Compensation3

Note 9 - Stock-based Compensation (Details) - Share-based Compensation Activity (USD $)

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

Jun. 30, 2014

Dec. 31, 2013

Dec. 31, 2011

Dec. 31, 2010

Dec. 31, 2009

Jun. 30, 2014

Dec. 31, 2013

Dec. 31, 2012

Jun. 30, 2014

Dec. 31, 2013

Dec. 31, 2011

Dec. 31, 2010

Dec. 31, 2009

Jun. 30, 2014

Dec. 31, 2013

Dec. 31, 2012

Restricted Stock [Member]

Restricted Stock [Member]

Restricted Stock [Member]

Restricted Stock [Member]

Restricted Stock [Member]

Restricted Stock [Member]

Restricted Stock [Member]

Restricted Stock [Member]

Mercantile Plans [Member]

Mercantile Plans [Member]

Mercantile Plans [Member]

Mercantile Plans [Member]

Mercantile Plans [Member]

Mercantile Plans [Member]

Note 9 - Stock-based Compensation (Details) - Share-based Compensation Activity [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Nonvested, shares

'

'

'

'

'

63,800

66,100

38,650

'

'

'

'

'

'

'

'

Nonvested, weighted average fair value

'

'

'

'

'

$14.30

$14.30

$6.20

'

'

'

'

'

'

'

'

Outstanding, shares

'

'

'

'

'

'

'

'

'

'

'

'

'

60,876

152,896

214,903

Outstanding, weighted average exercise price

'

'

'

'

'

'

'

'

'

'

'

'

'

$33.11

$26.15

$22.40

Options exercisable at period-end

'

'

'

'

'

'

'

'

'

'

'

'

'

56,890

60,876

152,896

Options exercisable at period-end

'

'

'

'

'

'

'

'

'

'

'

'

'

$33.79

$33.11

$26.15

Granted

0

0

0

0

0

'

'

'

'

'

'

'

'

0

0

0

Granted

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Exercised

'

'

'

'

'

'

'

'

'

'

'

'

'

-2,845

-51,055

-50,930

Exercised

'

'

'

'

'

'

'

'

'

'

'

'

'

$17.74

$13.72

$10.83

Forfeited or expired

'

'

'

'

'

'

'

'

'

'

'

'

'

-1,141

-40,965

-11,077

Forfeited or expired

'

'

'

'

'

'

'

'

'

'

'

'

'

$37.55

$31.30

$23.77

Granted

'

'

'

'

'

0

0

66,100

0

0

0

0

0

'

'

'

Granted

'

'

'

'

'

'

'

$14.30

'

'

'

'

'

'

'

'

Vested

'

'

'

'

'

-63,300

0

-38,266

'

'

'

'

'

'

'

'

Vested

'

'

'

'

'

$14.30

'

$6.20

'

'

'

'

'

'

'

'

Forfeited

'

'

'

'

'

-500

-2,300

-384

'

'

'

'

'

'

'

'

Forfeited

'

'

'

'

'

$14.30

$14.30

$6.20

'

'

'

'

'

'

'

'

Nonvested, shares

'

'

'

'

'

0

63,800

66,100

'

'

'

'

'

'

'

'

Nonvested, weighted average fair value

'

'

'

'

'

'

$14.30

$14.30

'

'

'

'

'

'

'

'

Outstanding, shares

'

'

'

'

'

'

'

'

'

'

'

'

'

56,890

60,876

152,896

Outstanding, weighted average exercise price

'

'

'

'

'

'

'

'

'

'

'

'

'

$33.79

$33.11

$26.15

Note_9_Stockbased_Compensation4

Note 9 - Stock-based Compensation (Details) - Options by Exercise Price Range (USD $)	6 Months Ended									12 Months Ended		1 Months Ended	6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014	Dec. 31, 2013	Dec. 31, 2012	Jun. 30, 2014	Jun. 30, 2014
	Exercise Price Range 1 [Member]	Exercise Price Range 1 [Member]	Exercise Price Range 2 [Member]	Exercise Price Range 2 [Member]	Exercise Price Range 3 [Member]	Exercise Price Range 3 [Member]	Exercise Price Range 4 [Member]	Exercise Price Range 5 [Member]	Mercantile Plans [Member]	Mercantile Plans [Member]	Mercantile Plans [Member]	Firstbank Plans [Member]	Firstbank Plans [Member]
	Mercantile Plans [Member]	Firstbank Plans [Member]	Mercantile Plans [Member]	Firstbank Plans [Member]	Mercantile Plans [Member]	Firstbank Plans [Member]	Firstbank Plans [Member]	Firstbank Plans [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'	'	'	'	'	'	'	'	'	'	'	'
Range of exercise prices, lower limit	$6.21	$4	$32.01	$8.01	$40.01	$12.01	$20.01	$24.01	$6.21	$6.21	$6.21	$7.80	'
Range of exercise prices, upper limit	$8	$8	$36	$12	$44	$16	$24	$28	$40.28	$40.28	$40.28	$24.46	'
Options, outstanding (in Shares)	2,700	78,855	51,300	31,830	2,890	46,000	85,962	36,456	56,890	'	'	279,103	279,103
Options, weighted average remaining contractual life	'1 year 146 days	'5 years 146 days	'328 days	'5 years 146 days	'109 days	'3 years 146 days	'1 year 328 days	'146 days	'328 days	'1 year 146 days	'1 year 328 days	'	'3 years 109 days
Options, outstanding weighted average exercise price	$6.21	$6.54	$34.87	$8.60	$40.28	$16	$22.43	$24.46	$33.79	'	'	$15.57	$15.57
Options, exercisable (in Shares)	2,700	62,215	51,300	24,740	2,890	46,000	85,962	36,456	56,890	'	'	255,373	255,373
Options, exercisable weighted average exercise price	$6.21	$6.90	$34.87	$8.60	$40.28	$16	$22.43	$24.46	$33.79	'	'	$16.44	$16.44

Note_9_Stockbased_Compensation5

Note 9 - Stock-based Compensation (Details) - Option Information (USD $)	6 Months Ended	12 Months Ended		1 Months Ended	6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Dec. 31, 2012	Jun. 30, 2014	Jun. 30, 2014
	Mercantile Plans [Member]	Mercantile Plans [Member]	Mercantile Plans [Member]	Firstbank Plans [Member]	Firstbank Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Minimum exercise price	$6.21	$6.21	$6.21	$7.80	'
Maximum exercise price	$40.28	$40.28	$40.28	$24.46	'
Average remaining option term (years)	'328 days	'1 year 146 days	'1 year 328 days	'	'3 years 109 days
Aggregate intrinsic value of stock options exercised	$11,000	$408,000	$307,000	$40,000	'
Cash received from stock option exercises	50,000	289,000	227,000	24,000	'
Tax benefit realized from stock option exercises	$0	$0	$0	$0	'
Weighted average per share fair value of stock options granted	'	'	'	'	'

Note_9_Stockbased_Compensation6

Note 9 - Stock-based Compensation (Details) - Stock Option Activity (USD $)	6 Months Ended	12 Months Ended				1 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Jun. 30, 2014
						Firstbank Plans [Member]
Note 9 - Stock-based Compensation (Details) - Stock Option Activity [Line Items]	'	'	'	'	'	'
Outstanding, shares	'	'	'	'	'	0
Outstanding, weighted average exercise price	'	'	'	'	'	'
Options exercisable at period-end	'	'	'	'	'	255,373
Options exercisable at period-end	'	'	'	'	'	$16.44
Granted	0	0	0	0	0	0
Granted	'	'	'	'	'	'
Assumed as part of merger	'	'	'	'	'	282,178
Assumed as part of merger	'	'	'	'	'	$15.48
Exercised	'	'	'	'	'	-3,075
Exercised	'	'	'	'	'	$7.80
Forfeited or expired	'	'	'	'	'	0
Forfeited or expired	'	'	'	'	'	'
Outstanding, shares	'	'	'	'	'	279,103
Outstanding, weighted average exercise price	'	'	'	'	'	$15.57

Note_10_Commitments_and_OffBal2

Note 10 - Commitments and Off-Balance Sheet Risk (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014
			Interest Rate Swap [Member]	Minimum [Member]	Maximum [Member]
Note 10 - Commitments and Off-Balance Sheet Risk (Details) [Line Items]	'	'	'	'	'
Reserve or Liability Balance for Financial Instruments with Off-balance Sheet Risk	$0	$0	'	'	'
Derivative, Notional Amount	'	'	17,600,000	'	'
Derivative, Fair Value, Net	($2,600,000)	'	'	'	'
Fees Accreted Into Income During Interest Rate Swap Agreements Term	'	'	'	'4 years	'15 years

Note_10_Commitments_and_OffBal3

Note 10 - Commitments and Off-Balance Sheet Risk (Details) - Exposure to Credit Losses (USD $)	Jun. 30, 2014	Dec. 31, 2013
Note 10 - Commitments and Off-Balance Sheet Risk (Details) - Exposure to Credit Losses [Line Items]	'	'
Contractual amounts of financial instruments with off-balance sheet risk	$633,028,000	$374,543,000
Unused lines of Credit [Member] | Commercial Portfolio Segment [Member]	'	'
Note 10 - Commitments and Off-Balance Sheet Risk (Details) - Exposure to Credit Losses [Line Items]	'	'
Contractual amounts of financial instruments with off-balance sheet risk	339,146,000	257,937,000
Unused lines of Credit [Member] | Retail 1-4 Family Mortgages [Member]	'	'
Note 10 - Commitments and Off-Balance Sheet Risk (Details) - Exposure to Credit Losses [Line Items]	'	'
Contractual amounts of financial instruments with off-balance sheet risk	60,439,000	23,429,000
Unused lines of Credit [Member] | Consumer Credit Card Financing Receivable [Member]	'	'
Note 10 - Commitments and Off-Balance Sheet Risk (Details) - Exposure to Credit Losses [Line Items]	'	'
Contractual amounts of financial instruments with off-balance sheet risk	9,180,000	9,013,000
Unused lines of Credit [Member] | Consumer Other Financing Receivable [Member]	'	'
Note 10 - Commitments and Off-Balance Sheet Risk (Details) - Exposure to Credit Losses [Line Items]	'	'
Contractual amounts of financial instruments with off-balance sheet risk	9,302,000	5,695,000
Loan Origination Commitments [Member]	'	'
Note 10 - Commitments and Off-Balance Sheet Risk (Details) - Exposure to Credit Losses [Line Items]	'	'
Contractual amounts of financial instruments with off-balance sheet risk	177,363,000	58,799,000
Standby Letters of Credit [Member]	'	'
Note 10 - Commitments and Off-Balance Sheet Risk (Details) - Exposure to Credit Losses [Line Items]	'	'
Contractual amounts of financial instruments with off-balance sheet risk	$37,598,000	$19,670,000

Note_11_Hedging_Activities_Det

Note 11 - Hedging Activities (Details) (USD $)	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Feb. 29, 2012	Feb. 29, 2012
					Junior Subordinated Debt [Member]
					London Interbank Offered Rate (LIBOR) [Member]
Note 11 - Hedging Activities (Details) [Line Items]	'	'	'	'	'
Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust	$54,131,000	'	$32,990,000	$32,000,000	'
Debt Instrument, Basis Spread on Variable Rate	'	'	'	'	2.18%
Derivative, Notional Amount	'	'	'	'	32,000,000
Fair Value of Interest Rate Swap Agreement Liability	'	$400,000	$300,000	'	'

Note_12_Fair_Values_of_Financi2

Note 12 - Fair Values of Financial Instruments (Details) - Fair Value Hierarchy of Financial Instruments (USD $)	Jun. 30, 2014		Dec. 31, 2013
Financial assets:	'		'
Securities available for sale	$475,275,000	[1]	$131,178,000	[1]
FHLB stock	19,226,000	[2]	11,961,000	[2]
FHLB stock	19,226,000	[2]	11,961,000	[2]
Bank owned life insurance	55,693,000		51,377,000
Accrued interest receivable	7,711,000		3,649,000
Financial liabilities:	'		'
Deposits	2,303,261,000		1,118,911,000
Repurchase agreements	124,108,000		69,305,000
Accrued interest payable	10,252,000		5,815,000
Fair Value, Inputs, Level 1 [Member]	'		'
Financial assets:	'		'
Cash	14,040,000		1,464,000
Cash	14,040,000		1,464,000
Fair Value, Inputs, Level 2 [Member]	'		'
Financial assets:	'		'
Cash equivalents	104,813,000		145,501,000
Cash equivalents	104,813,000		145,501,000
Bank owned life insurance	55,693,000		51,377,000
Bank owned life insurance	55,693,000		51,377,000
Accrued interest receivable	7,711,000		3,649,000
Accrued interest receivable	7,711,000		3,649,000
Financial liabilities:	'		'
Deposits	2,305,253,000		1,120,576,000
Deposits	2,303,261,000		1,118,911,000
Repurchase agreements	124,108,000		69,305,000
Repurchase agreements	124,108,000		69,305,000
FHLB advances	57,235,000		45,139,000
FHLB advances	57,044,000		45,000,000
Subordinated debentures	54,087,000		32,974,000
Subordinated debentures	54,131,000		32,990,000
Accrued interest payable	2,159,000		2,041,000
Accrued interest payable	2,159,000		2,041,000
Fair Value, Inputs, Level 3 [Member]	'		'
Financial assets:	'		'
Loans, net	2,049,625,000		1,027,300,000
Loans, net	2,052,626,000		1,030,422,000
Interest Rate Swap [Member]	'		'
Financial liabilities:	'		'
Interest rate swap	390,000	[1]	264,000	[1]
Interest rate swap	$390,000	[1]	$264,000	[1]
[1]	See Note 13 for a description of the fair value hierarchy as well as a disclosure of levels for classes of financial assets and liabilities.
[2]	It is not practical to determine the fair value of FHLB stock due to transferability restrictions.

Note_13_Fair_Values_Details

Note 13 - Fair Values (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Disclosure Text Block [Abstract]	'	'
Disposal Group, Including Discontinued Operation, Mortgage Loans	$1.90	$1.10

Note_13_Fair_Values_Details_As

Note 13 - Fair Values (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis (USD $)	Jun. 30, 2014		Dec. 31, 2013
Note 13 - Fair Values (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]	'		'
Available for sale securities	$475,275,000	[1]	$131,178,000	[1]
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]	'		'
Note 13 - Fair Values (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]	'		'
Available for sale securities	0		0
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]	'		'
Note 13 - Fair Values (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]	'		'
Available for sale securities	213,706,000		98,477,000
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]	'		'
Note 13 - Fair Values (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]	'		'
Available for sale securities	0		0
US Government Agencies Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]	'		'
Note 13 - Fair Values (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]	'		'
Available for sale securities	213,706,000		98,477,000
US Government Agencies Debt Securities [Member]	'		'
Note 13 - Fair Values (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]	'		'
Available for sale securities	213,706,000		98,477,000
Collateralized Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]	'		'
Note 13 - Fair Values (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]	'		'
Available for sale securities	0		0
Collateralized Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]	'		'
Note 13 - Fair Values (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]	'		'
Available for sale securities	108,172,000		13,558,000
Collateralized Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]	'		'
Note 13 - Fair Values (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]	'		'
Available for sale securities	0		0
Collateralized Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member]	'		'
Note 13 - Fair Values (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]	'		'
Available for sale securities	108,172,000		13,558,000
Collateralized Mortgage Backed Securities [Member]	'		'
Note 13 - Fair Values (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]	'		'
Available for sale securities	108,172,000		13,558,000
Municipal General Obligation Bonds [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]	'		'
Note 13 - Fair Values (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]	'		'
Available for sale securities	0		0
Municipal General Obligation Bonds [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]	'		'
Note 13 - Fair Values (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]	'		'
Available for sale securities	128,791,000		16,872,000
Municipal General Obligation Bonds [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]	'		'
Note 13 - Fair Values (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]	'		'
Available for sale securities	11,378,000		0
Municipal General Obligation Bonds [Member] | Fair Value, Measurements, Recurring [Member]	'		'
Note 13 - Fair Values (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]	'		'
Available for sale securities	140,169,000		16,872,000
Municipal General Obligation Bonds [Member]	'		'
Note 13 - Fair Values (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]	'		'
Available for sale securities	140,169,000		16,872,000
Municipal Revenue Bonds [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]	'		'
Note 13 - Fair Values (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]	'		'
Available for sale securities	0		0
Municipal Revenue Bonds [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]	'		'
Note 13 - Fair Values (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]	'		'
Available for sale securities	11,324,000		916,000
Municipal Revenue Bonds [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]	'		'
Note 13 - Fair Values (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]	'		'
Available for sale securities	0		0
Municipal Revenue Bonds [Member] | Fair Value, Measurements, Recurring [Member]	'		'
Note 13 - Fair Values (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]	'		'
Available for sale securities	11,324,000		916,000
Municipal Revenue Bonds [Member]	'		'
Note 13 - Fair Values (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]	'		'
Available for sale securities	11,324,000		916,000
Other Debt Obligations [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]	'		'
Note 13 - Fair Values (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]	'		'
Available for sale securities	0		0
Other Debt Obligations [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]	'		'
Note 13 - Fair Values (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]	'		'
Available for sale securities	1,904,000		1,355,000
Other Debt Obligations [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]	'		'
Note 13 - Fair Values (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]	'		'
Available for sale securities	0		0
Other Debt Obligations [Member] | Fair Value, Measurements, Recurring [Member]	'		'
Note 13 - Fair Values (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]	'		'
Available for sale securities	1,904,000		1,355,000
Other Debt Obligations [Member]	'		'
Note 13 - Fair Values (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]	'		'
Available for sale securities	1,904,000		'
Fair Value, Inputs, Level 1 [Member] | Interest Rate Swap [Member] | Fair Value, Measurements, Recurring [Member]	'		'
Note 13 - Fair Values (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]	'		'
Derivative	0		0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]	'		'
Note 13 - Fair Values (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]	'		'
Assets and Liabilities measured at fair value on recurring basis	0		0
Fair Value, Inputs, Level 2 [Member] | Interest Rate Swap [Member] | Fair Value, Measurements, Recurring [Member]	'		'
Note 13 - Fair Values (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]	'		'
Derivative	-390,000		-264,000
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]	'		'
Note 13 - Fair Values (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]	'		'
Assets and Liabilities measured at fair value on recurring basis	463,507,000		130,914,000
Fair Value, Inputs, Level 3 [Member] | Interest Rate Swap [Member] | Fair Value, Measurements, Recurring [Member]	'		'
Note 13 - Fair Values (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]	'		'
Derivative	0		0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]	'		'
Note 13 - Fair Values (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]	'		'
Assets and Liabilities measured at fair value on recurring basis	11,378,000		0
Interest Rate Swap [Member] | Fair Value, Measurements, Recurring [Member]	'		'
Note 13 - Fair Values (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]	'		'
Derivative	-390,000		-264,000
Fair Value, Measurements, Recurring [Member]	'		'
Note 13 - Fair Values (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]	'		'
Assets and Liabilities measured at fair value on recurring basis	$474,885,000		$130,914,000
[1]	See Note 13 for a description of the fair value hierarchy as well as a disclosure of levels for classes of financial assets and liabilities.

Note_13_Fair_Values_Details_As1

Note 13 - Fair Values (Details) - Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis (Fair Value, Measurements, Nonrecurring [Member], USD $)	Jun. 30, 2014		Dec. 31, 2013
Note 13 - Fair Values (Details) - Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis [Line Items]	'		'
Impaired loans	$18,899,000	[1]	$23,405,000	[1]
Foreclosed assets	2,878,000	[1]	2,851,000	[1]
Assets and liabilities measured at fair value on a nonrecurring basis	21,777,000		26,256,000
Fair Value, Inputs, Level 1 [Member]	'		'
Note 13 - Fair Values (Details) - Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis [Line Items]	'		'
Impaired loans	0	[1]	0	[1]
Foreclosed assets	0	[1]	0	[1]
Assets and liabilities measured at fair value on a nonrecurring basis	0		0
Fair Value, Inputs, Level 2 [Member]	'		'
Note 13 - Fair Values (Details) - Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis [Line Items]	'		'
Impaired loans	0	[1]	0	[1]
Foreclosed assets	0	[1]	0	[1]
Assets and liabilities measured at fair value on a nonrecurring basis	0		0
Fair Value, Inputs, Level 3 [Member]	'		'
Note 13 - Fair Values (Details) - Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis [Line Items]	'		'
Impaired loans	18,899,000	[1]	23,405,000	[1]
Foreclosed assets	2,878,000	[1]	2,851,000	[1]
Assets and liabilities measured at fair value on a nonrecurring basis	$21,777,000		$26,256,000
[1]	Represents carrying value and related write-downs for which adjustments are based on the estimated value of the property or other assets.

Note_14_Regulatory_Matters_Det

Note 14 - Regulatory Matters (Details) (USD $)	0 Months Ended			3 Months Ended		6 Months Ended				0 Months Ended
	Jun. 25, 2014	29-May-14	Mar. 10, 2014	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013	Dec. 31, 2009	Jul. 17, 2014
										Subsequent Event [Member]
Note 14 - Regulatory Matters (Details) [Line Items]	'	'	'	'	'	'	'	'	'	'
Trust Preferred Securities Included in Tier One Capital (in Dollars)	'	'	'	$52,100,000	'	$52,100,000	'	$32,000,000	'	'
Maximum Restricted Core Element Allowed in Tier One Capital, Percent	'	'	'	'	'	25.00%	'	'	'	'
Maximum Level of Consolidated Aggregate Assets Allowing for Inclusion of Trust Preferred Securities in Tier One Capital (in Dollars)	'	'	'	'	'	'	'	'	$15,000,000,000	'
Common Stock, Dividends, Per Share, Cash Paid	$0.12	$2	$0.12	$2.12	$0.11	$2.24	$0.21	'	'	'
Common Stock, Dividends, Per Share, Declared	'	'	'	'	'	'	'	'	'	$0.12

Note_14_Regulatory_Matters_Det1

Note 14 - Regulatory Matters (Details) - Actual Capital Levels and Minimum Levels (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Consolidated Entities [Member]	'	'
Total capital (to risk weighted assets)	'	'
Total capital (to risk weighted assets), actual amount	$323,221	$193,925
Total capital (to risk weighted assets), actual ratio	14.00%	15.90%
Total capital (to risk weighted assets), minimum required for capital adequacy purposes amount	184,700	97,498
Total capital (to risk weighted assets), minimum required for capital adequacy purposes ratio	8.00%	8.00%
Total capital (to risk weighted assets), minimum required to be well capitalized under prompt corrective action regulations amount	'	'
Total capital (to risk weighted assets), minimum required to be well capitalized under prompt corrective action regulations ratio	'	'
Tier 1 capital (to risk weighted assets)	'	'
Tier 1 capital (to risk weighted assets), actual amount	302,365	178,598
Tier 1 capital (to risk weighted assets), actual ratio	13.10%	14.70%
Tier 1 capital (to risk weighted assets), minimum required for capital adequacy purposes amount	92,350	48,749
Tier 1 capital (to risk weighted assets), minimum required for capital adequacy purposes ratio	4.00%	4.00%
Tier 1 capital (to risk weighted assets), minimum required to be well capitalized under prompt corrective action regulations amount	'	'
Tier 1 capital (to risk weighted assets), minimum required to be well capitalized under prompt corrective action regulations ratio	'	'
Tier 1 capital (to average assets)	'	'
Tier 1 capital (to average assets), actual amount	302,365	178,598
Tier 1 capital (to average assets), actual ratio	16.70%	12.50%
Tier 1 capital (to average assets), minimum required for capital adequacy purposes amount	72,553	57,006
Tier 1 capital (to risk average assets), minimum required for capital adequacy purposes ratio	4.00%	4.00%
Tier 1 capital (to risk average assets), minimum required to be well capitalized under prompt corrective action regulations amount	'	'
Tier 1 capital (to risk average assets), minimum required to be well capitalized under prompt corrective action regulations ratio	'	'
Bank [Member]	'	'
Total capital (to risk weighted assets)	'	'
Total capital (to risk weighted assets), actual amount	318,888	190,493
Total capital (to risk weighted assets), actual ratio	13.70%	15.70%
Total capital (to risk weighted assets), minimum required for capital adequacy purposes amount	185,762	97,329
Total capital (to risk weighted assets), minimum required for capital adequacy purposes ratio	8.00%	8.00%
Total capital (to risk weighted assets), minimum required to be well capitalized under prompt corrective action regulations amount	232,203	121,662
Total capital (to risk weighted assets), minimum required to be well capitalized under prompt corrective action regulations ratio	10.00%	10.00%
Tier 1 capital (to risk weighted assets)	'	'
Tier 1 capital (to risk weighted assets), actual amount	298,032	175,192
Tier 1 capital (to risk weighted assets), actual ratio	12.80%	14.40%
Tier 1 capital (to risk weighted assets), minimum required for capital adequacy purposes amount	92,881	48,665
Tier 1 capital (to risk weighted assets), minimum required for capital adequacy purposes ratio	4.00%	4.00%
Tier 1 capital (to risk weighted assets), minimum required to be well capitalized under prompt corrective action regulations amount	139,322	72,997
Tier 1 capital (to risk weighted assets), minimum required to be well capitalized under prompt corrective action regulations ratio	6.00%	6.00%
Tier 1 capital (to average assets)	'	'
Tier 1 capital (to average assets), actual amount	298,032	175,192
Tier 1 capital (to average assets), actual ratio	16.40%	12.30%
Tier 1 capital (to average assets), minimum required for capital adequacy purposes amount	72,810	56,860
Tier 1 capital (to risk average assets), minimum required for capital adequacy purposes ratio	4.00%	4.00%
Tier 1 capital (to risk average assets), minimum required to be well capitalized under prompt corrective action regulations amount	$91,012	$71,075
Tier 1 capital (to risk average assets), minimum required to be well capitalized under prompt corrective action regulations ratio	5.00%	5.00%