Macatawa Bank Corporation Quarterly report pursuant to Section 13 or 15(d)

COMMITMENTS AND OFF BALANCE-SHEET RISK (Details) (USD $)	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Summary of the contractual amounts of financial instruments with off-balance-sheet risk [Abstract]
Notional amount of commitments to fund mortgage loans to be sold into the secondary market	$ 13,700,000	$ 14,700,000
Commitments to make loans at fixed rates (in hundredths)	34.00%
Expiration period of commitment to make variable rate loan	30 days
Commitments to make Loans [Member]
Summary of the contractual amounts of financial instruments with off-balance-sheet risk [Abstract]
Contractual amounts of financial instruments with off-balance-sheet risk	141,628,000	87,513,000
Letters of Credit [Member]
Summary of the contractual amounts of financial instruments with off-balance-sheet risk [Abstract]
Contractual amounts of financial instruments with off-balance-sheet risk	10,827,000	10,774,000
Unused lines of Credit [Member]
Summary of the contractual amounts of financial instruments with off-balance-sheet risk [Abstract]
Contractual amounts of financial instruments with off-balance-sheet risk	$ 360,344,000	$ 313,232,000