Deposits - Scheduled Maturities of Time Deposits (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Time Deposits, Fiscal Year Maturity [Abstract]
2017	$ 47,125
2018	41,455
2019	26,391
2020	12,669
2021	18,855
Thereafter	10,463
Total amount	$ 156,958	$ 113,477
Percent
2017	30.00%
2018	26.40%
2019	16.80%
2020	8.10%
2021	12.00%
Thereafter	6.70%
Total percent	100.00%

Weighted average interest rate for time deposits held by the entity with maturities.

No definition available.

Name:	emcf_TimeDepositsWeightedAverageInterestRateMaturities
Namespace Prefix:	emcf_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of time deposits maturing after the fifth fiscal year following the latest fiscal year. Time deposits include, but are not limited to, certificates of deposits. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.