XML 42 R31.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Note 2 - Investment Securities - General Obligation and Revenue Bonds (Details) | Sep. 30, 2017 USD ($) | Dec. 31, 2016 USD ($)
--- | --- | ---
General Obligation Bonds [Member] |  |
Number of issuers | 119 | 116
Amortized cost | $ 100,310,981 | $ 117,205,307
Fair value | 100,424,010 | 116,472,635
Average exposure per issuer (fair value) | $ 843,899 | $ 1,004,074
General Obligation Bonds [Member] | North Dakota [Member] |  |
Number of issuers | 7 | 7
Amortized cost | $ 21,625,068 | $ 22,169,050
Fair value | 21,593,895 | 21,499,075
Average exposure per issuer (fair value) | $ 3,084,842 | $ 3,071,296
General Obligation Bonds [Member] | Iowa [Member] |  |
Number of issuers | 21 | 27
Amortized cost | $ 17,990,978 | $ 32,258,612
Fair value | 17,993,895 | 32,231,936
Average exposure per issuer (fair value) | $ 856,852 | $ 1,193,775
General Obligation Bonds [Member] | Missouri [Member] |  |
Number of issuers | 16 | 14
Amortized cost | $ 8,956,396 | $ 8,291,192
Fair value | 8,983,511 | 8,323,245
Average exposure per issuer (fair value) | $ 561,469 | $ 594,518
General Obligation Bonds [Member] | Illinois [Member] |  |
Number of issuers | 21 | 19
Amortized cost | $ 18,319,644 | $ 29,214,559
Fair value | 18,501,854 | 29,308,438
Average exposure per issuer (fair value) | $ 881,041 | $ 1,542,549
General Obligation Bonds [Member] | Ohio [Member] |  |
Number of issuers | 9 | 8
Amortized cost | $ 8,289,069 | $ 6,790,398
Fair value | 8,180,432 | 6,651,897
Average exposure per issuer (fair value) | $ 908,937 | $ 831,487
General Obligation Bonds [Member] | Texas [Member] |  |
Number of issuers | 10 |
Amortized cost | $ 6,609,101 |
Fair value | 6,543,660 |
Average exposure per issuer (fair value) | $ 654,366 |
General Obligation Bonds [Member] | Other States [Member] |  |
Number of issuers | 35 | 41
Amortized cost | $ 18,520,725 | $ 18,481,496
Fair value | 18,626,763 | 18,458,044
Average exposure per issuer (fair value) | $ 532,193 | $ 450,196
Revenue Bonds [Member] |  |
Number of issuers | 132 | 120
Amortized cost | $ 279,241,658 | $ 257,470,290
Fair value | 278,725,628 | 255,496,690
Average exposure per issuer (fair value) | $ 2,111,558 | $ 2,129,139
Revenue Bonds [Member] | North Dakota [Member] |  |
Number of issuers | 5 | 4
Amortized cost | $ 11,496,420 | $ 8,089,067
Fair value | 11,471,544 | 7,796,381
Average exposure per issuer (fair value) | $ 2,294,309 | $ 1,949,095
Revenue Bonds [Member] | Iowa [Member] |  |
Number of issuers | 28 | 31
Amortized cost | $ 62,468,124 | $ 70,788,393
Fair value | 62,615,875 | 71,142,393
Average exposure per issuer (fair value) | $ 2,236,281 | $ 2,294,916
Revenue Bonds [Member] | Missouri [Member] |  |
Number of issuers | 55 | 47
Amortized cost | $ 107,274,712 | $ 90,784,441
Fair value | 107,108,520 | 89,664,013
Average exposure per issuer (fair value) | $ 1,947,428 | $ 1,907,745
Revenue Bonds [Member] | Indiana [Member] |  |
Number of issuers | 23 | 22
Amortized cost | $ 50,080,705 | $ 47,994,737
Fair value | 49,560,095 | 47,582,138
Average exposure per issuer (fair value) | $ 2,154,787 | $ 2,162,824
Revenue Bonds [Member] | Ohio [Member] |  |
Number of issuers | 5 | 3
Amortized cost | $ 19,674,376 | $ 13,650,000
Fair value | 19,523,478 | 13,405,222
Average exposure per issuer (fair value) | $ 3,904,696 | $ 4,468,407
Revenue Bonds [Member] | Kansas [Member] |  |
Number of issuers | 6 | 6
Amortized cost | $ 12,877,308 | $ 13,476,366
Fair value | 12,879,871 | 13,427,491
Average exposure per issuer (fair value) | $ 2,146,645 | $ 2,237,915
Revenue Bonds [Member] | Other States [Member] |  |
Number of issuers | 10 | 7
Amortized cost | $ 15,370,013 | $ 12,687,286
Fair value | 15,566,245 | 12,479,052
Average exposure per issuer (fair value) | $ 1,556,625 | $ 1,782,722

X
- Definition Amount of average exposure (fair value) of securities, per issuer. + References No definition available. + Details
Name: | qcrh_AverageExposurePerIssuerFairValue
Namespace Prefix: | qcrh_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount before other than temporary impairment (OTTI) accretion, of investments in debt securities not classified as available-for-sale, held-to-maturity, or trading. + References No definition available. + Details
Name: | qcrh_MarketableSecuritiesAmortizedCostBeforeOtherThanTemporaryImpairment
Namespace Prefix: | qcrh_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Number of issuers of debt securities. + References No definition available. + Details
Name: | qcrh_NumberOfIssuers
Namespace Prefix: | qcrh_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of investments classified as other. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(f,g)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
Name: | us-gaap_OtherInvestments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_InvestmentTypeAxis=qcrh_GeneralObligationBondsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | invest_InvestmentGeographicRegionAxis=qcrh_NorthDakotaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | invest_InvestmentGeographicRegionAxis=qcrh_IowaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | invest_InvestmentGeographicRegionAxis=qcrh_MissouriMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | invest_InvestmentGeographicRegionAxis=qcrh_IllinoisMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | invest_InvestmentGeographicRegionAxis=qcrh_OhioMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | invest_InvestmentGeographicRegionAxis=qcrh_TexasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | invest_InvestmentGeographicRegionAxis=qcrh_OtherStatesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=qcrh_RevenueBondsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | invest_InvestmentGeographicRegionAxis=qcrh_IndianaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | invest_InvestmentGeographicRegionAxis=qcrh_KansasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |