XML 41 R27.htm IDEA: XBRL DOCUMENT
v3.19.2

SECURITIES (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2019
Schedule of Investments [Line Items] |
Gross Realized Gain and Losses on the Sale of Securities | The following table presents the gross realized gains and losses on and the proceeds from the sale of securities during the three and six months ended June 30, 2019 and 2018 (dollars in thousands).
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Three Months Ended |  | Six Months Ended
​ | ​ | June 30, 2019 | ​ | June 30, 2019
Realized gains (losses): |  | ​ |  |  | ​ |
Gross realized gains | ​ | $ | 844 | ​ | $ | 2,057
Gross realized losses | ​ |  | (793) | ​ |  | (1,855)
Net realized gains | ​ | $ | 51 | ​ | $ | 202
​ | ​ | ​ | ​ | ​ | ​ | ​
Proceeds from sales of securities | ​ | $ | 179,701 | ​ | $ | 387,950
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Three Months Ended |  | Six Months Ended
​ | ​ | June 30, 2018 | ​ | June 30, 2018
Realized gains (losses): |  | ​ |  |  | ​ |
Gross realized gains | ​ | $ | 2,095 | ​ | $ | 2,793
Gross realized losses | ​ |  | (2,183) | ​ |  | (2,668)
Net realized gains | ​ | $ | (88) | ​ | $ | 125
​ | ​ | ​ | ​ | ​ | ​ | ​
Proceeds from sales of securities | ​ | $ | 193,666 | ​ | $ | 309,516
​
Available-for-sale Securities |
Schedule of Investments [Line Items] |
Amortized Cost, Gross Unrealized Gains and Losses, and Estimated Fair Values of Investment Securities | The amortized cost, gross unrealized gains and losses, and estimated fair values of AFS securities as of June 30, 2019 and December 31, 2018 are summarized as follows (dollars in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Amortized | ​ | Gross Unrealized | ​ | Estimated
​ |  | Cost |  | Gains |  | (Losses) |  | Fair Value
June 30, 2019 |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
U.S. government and agency securities | ​ | $ | 4,462 | ​ | $ | 18 | ​ | $ | — | ​ | $ | 4,480
Obligations of states and political subdivisions | ​ |  | 485,192 | ​ |  | 24,566 | ​ |  | (11) | ​ |  | 509,747
Corporate and other bonds (1) | ​ |  | 202,935 | ​ |  | 3,887 | ​ |  | (509) | ​ |  | 206,313
Mortgage-backed securities | ​ |  | 1,253,541 | ​ |  | 23,293 | ​ |  | (1,429) | ​ |  | 1,275,405
Other securities | ​ |  | 3,549 | ​ |  | — | ​ |  | — | ​ |  | 3,549
Total AFS securities | ​ | $ | 1,949,679 | ​ | $ | 51,764 | ​ | $ | (1,949) | ​ | $ | 1,999,494
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
December 31, 2018 | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Obligations of states and political subdivisions | ​ | $ | 466,588 | ​ | $ | 3,844 | ​ | $ | (1,941) | ​ | $ | 468,491
Corporate and other bonds (1) | ​ |  | 167,561 | ​ |  | 1,118 | ​ |  | (983) | ​ |  | 167,696
Mortgage-backed securities | ​ |  | 1,138,034 | ​ |  | 4,452 | ​ |  | (12,621) | ​ |  | 1,129,865
Other securities | ​ |  | 8,769 | ​ |  | — | ​ |  | — | ​ |  | 8,769
Total AFS securities | ​ | $ | 1,780,952 | ​ | $ | 9,414 | ​ | $ | (15,545) | ​ | $ | 1,774,821
(1) | Other bonds includes asset-backed securities.
Schedule of Gross Unrealized Losses and Fair Value of Investments | The following table shows the gross unrealized losses and fair value of the Company’s AFS securities with unrealized losses that are not deemed to be other-than-temporarily impaired as of June 30, 2019 and December 31, 2018 (dollars in thousands). These are aggregated by investment category and length of time that the individual securities have been in a continuous unrealized loss position.
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Less than 12 months | ​ | More than 12 months | ​ | Total
​ |  | Fair |  | Unrealized |  | Fair |  | Unrealized |  | Fair |  | Unrealized
​ | ​ | Value | ​ | Losses | ​ | Value | ​ | Losses | ​ | Value | ​ | Losses
June 30, 2019 |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Obligations of states and political subdivisions | ​ | $ | 775 | ​ | $ | — | ​ | $ | 731 | ​ | $ | (11) | ​ | $ | 1,506 | ​ | $ | (11)
Corporate bonds and other securities | ​ |  | 10,518 | ​ |  | (85) | ​ |  | 33,592 | ​ |  | (424) | ​ |  | 44,110 | ​ |  | (509)
Mortgage-backed securities | ​ |  | 26,826 | ​ |  | (116) | ​ |  | 149,629 | ​ |  | (1,313) | ​ |  | 176,455 | ​ |  | (1,429)
Total AFS securities | ​ | $ | 38,119 | ​ | $ | (201) | ​ | $ | 183,952 | ​ | $ | (1,748) | ​ | $ | 222,071 | ​ | $ | (1,949)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
December 31, 2018 | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Obligations of states and political subdivisions | ​ | $ | 133,513 | ​ | $ | (1,566) | ​ | $ | 10,145 | ​ | $ | (375) | ​ | $ | 143,658 | ​ | $ | (1,941)
Corporate bonds and other securities | ​ |  | 35,478 | ​ |  | (315) | ​ |  | 33,888 | ​ |  | (668) | ​ |  | 69,366 | ​ |  | (983)
Mortgage-backed securities | ​ |  | 306,038 | ​ |  | (3,480) | ​ |  | 341,400 | ​ |  | (9,141) | ​ |  | 647,438 | ​ |  | (12,621)
Total AFS securities | ​ | $ | 475,029 | ​ | $ | (5,361) | ​ | $ | 385,433 | ​ | $ | (10,184) | ​ | $ | 860,462 | ​ | $ | (15,545)
Schedule of Amortized Cost and Estimated Fair Value of Securities | The following table presents the amortized cost and estimated fair value of AFS securities as of June 30, 2019 and December 31, 2018, by contractual maturity (dollars in thousands). Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30, 2019 | December 31, 2018
​ |  | Amortized |  | Estimated |  | Amortized |  | Estimated
​ | ​ | Cost | ​ | Fair Value | ​ | Cost | ​ | Fair Value
Due in one year or less | ​ | $ | 16,726 | ​ | $ | 16,828 | ​ | $ | 22,653 | ​ | $ | 22,789
Due after one year through five years | ​ |  | 164,576 | ​ |  | 166,589 | ​ |  | 191,003 | ​ |  | 188,999
Due after five years through ten years | ​ |  | 246,735 | ​ |  | 252,016 | ​ |  | 218,211 | ​ |  | 217,304
Due after ten years | ​ |  | 1,521,642 | ​ |  | 1,564,061 | ​ |  | 1,349,085 | ​ |  | 1,345,729
Total AFS securities | ​ | $ | 1,949,679 | ​ | $ | 1,999,494 | ​ | $ | 1,780,952 | ​ | $ | 1,774,821
Held-to-maturity Securities |
Schedule of Investments [Line Items] |
Schedule of Amortized Cost and Estimated Fair Value of Securities | The following table presents the amortized cost and estimated fair value of HTM securities as of June 30, 2019 and December 31, 2018, by contractual maturity (dollars in thousands). Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30, 2019 | ​ | December 31, 2018
​ |  | Carrying |  | Estimated |  | Carrying |  | Estimated
​ | ​ | Value | ​ | Fair Value | ​ | Value | ​ | Fair Value
Due in one year or less | ​ | $ | 250 | ​ | $ | 250 | ​ | $ | — | ​ | $ | —
Due after one year through five years | ​ |  | 8,167 | ​ |  | 8,354 | ​ |  | 3,893 | ​ |  | 3,900
Due after five years through ten years | ​ |  | 3,992 | ​ |  | 4,093 | ​ |  | 3,480 | ​ |  | 3,507
Due after ten years | ​ |  | 546,094 | ​ |  | 584,878 | ​ |  | 484,899 | ​ |  | 492,094
Total HTM securities | ​ | $ | 558,503 | ​ | $ | 597,575 | ​ | $ | 492,272 | ​ | $ | 499,501
Schedule of Carrying Values, Gross Unrealized Gains and Losses and Estimated Fair Value of Securities | The carrying value, gross unrealized gains and losses, and estimated fair values of HTM securities as of June 30, 2019 and December 31, 2018 are summarized as follows (dollars in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Carrying | ​ | Gross Unrealized | ​ | Estimated
​ |  | Value |  | Gains |  | (Losses) |  | Fair Value
June 30, 2019 |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Obligations of states and political subdivisions | ​ | $ | 547,591 | ​ | $ | 38,966 | ​ | $ | — | ​ | $ | 586,557
Mortgage-backed securities | ​ |  | 10,912 | ​ |  | 106 | ​ |  | — | ​ |  | 11,018
Total held-to-maturity securities | ​ | $ | 558,503 | ​ | $ | 39,072 | ​ | $ | — | ​ | $ | 597,575
December 31, 2018 | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Obligations of states and political subdivisions | ​ | $ | 492,272 | ​ | $ | 7,375 | ​ | $ | (146) | ​ | $ | 499,501
Gross Unrealized Losses and Fair Value of Securities | The following table shows the gross unrealized losses and fair value (dollars in thousands) of the Company’s HTM securities with unrealized losses that are not deemed to be other-than-temporarily impaired as of June 30, 2019 and December 31, 2018 (dollars in thousands). These are aggregated by investment category and length of time that the individual securities have been in a continuous unrealized loss position.
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Less than 12 months | ​ | More than 12 months | ​ | Total
​ |  | Fair |  | Unrealized |  | Fair |  | Unrealized |  | Fair |  | Unrealized
​ | ​ | Value | ​ | Losses (1) | ​ | Value | ​ | Losses (1) | ​ | Value | ​ | Losses (1)
June 30, 2019 |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Obligations of states and political subdivisions | ​ | $ | 250 | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | 250 | ​ | $ | —
(1) Losses were less than $1,000 as of June 30, 2019 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
December 31, 2018 |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Obligations of states and political subdivisions | ​ | $ | 43,206 | ​ | $ | (146) | ​ | $ | — | ​ | $ | — | ​ | $ | 43,206 | ​ | $ | (146)

X
- Definition Held To Maturity Securities Continuous Unrealized Loss Position Fair Value [Table Text Block] + References No definition available. + Details
Name: | aub_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValueTableTextBlock
Namespace Prefix: | aub_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=118942371&loc=SL82922954-210456 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27290-111563 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=118955579&loc=SL82922888-210455 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionFairValueTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of information about investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27232-111563 + Details
Name: | us-gaap_HeldToMaturitySecuritiesTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments. + References No definition available. + Details
Name: | us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of realized gains and losses on investments reported in the statement of income. + References No definition available. + Details
Name: | us-gaap_RealizedGainLossOnInvestmentsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value. + References No definition available. + Details
Name: | us-gaap_ScheduleOfAvailableForSaleSecuritiesReconciliationTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ScheduleOfInvestmentsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_InformationByCategoryOfDebtSecurityAxis=us-gaap_AvailableforsaleSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InformationByCategoryOfDebtSecurityAxis=us-gaap_HeldtomaturitySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |