Regulatory and Capital Matters (Tables)

12 Months Ended

Dec. 31, 2013

Banking and Thrift [Abstract]

Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations

The following table outlines the Company's and the Bank's measures of capital as of the dates presented and the capital guidelines established by the Federal Reserve to be categorized as adequately capitalized and as "well-capitalized."

Summary of Capital Ratios

(Dollar amounts in thousands)

	Actual			Adequately Capitalized			To Be Well-Capitalized Under Prompt Corrective Action Provisions
	Capital		Ratio %	Capital		Ratio %	Capital		Ratio %
As of December 31, 2013:
Total capital (to risk-weighted assets):
First Midwest Bancorp, Inc.	$	841,787	12.39	$	543,573	8.00	$	679,467	10.00
First Midwest Bank	897,255		13.86	517,721		8.00	647,152		10.00
Tier 1 capital (to risk-weighted assets):
First Midwest Bancorp, Inc.	741,414		10.91	271,787		4.00	407,680		6.00
First Midwest Bank	816,286		12.61	258,861		4.00	388,291		6.00
Tier 1 leverage (to average assets):
First Midwest Bancorp, Inc.	741,414		9.18	242,277		3.00	403,794		5.00
First Midwest Bank	816,286		10.24	239,065		3.00	398,442		5.00
As of December 31, 2012:
Total capital (to risk-weighted assets):
First Midwest Bancorp, Inc.	$	755,264	11.90	$	507,882	8.00	$	634,852	10.00
First Midwest Bank	859,018		13.76	499,390		8.00	624,237		10.00
Tier 1 capital (to risk-weighted assets):
First Midwest Bancorp, Inc.	652,480		10.28	253,941		4.00	380,911		6.00
First Midwest Bank	780,631		12.51	249,695		4.00	374,542		6.00
Tier 1 leverage (to average assets):
First Midwest Bancorp, Inc.	652,480		8.40	233,069		3.00	388,448		5.00
First Midwest Bank	780,631		10.09	232,071		3.00	386,785		5.00