Goodwill and Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Gross Carrying Amount	$ 7,691	$ 7,691
Accumulated Amortization	2,719	2,447
Goodwill [Member]
Gross Carrying Amount	3,664	3,664
Accumulated Amortization	0	0
Core Deposits [Member]
Gross Carrying Amount	4,027	4,027
Accumulated Amortization	$ 2,719	$ 2,447

Sum of the gross carrying amounts before accumulated amortization and impairment as of the balance sheet date of finite lived intangibles and goodwill.

No definition available.

Name:	emcf_FiniteLivedIntangiblesAndGoodwillGross
Namespace Prefix:	emcf_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant