XML 68 R56.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Employee Benefit Plans (Stock Options Outstanding And Exercisable) (Details) $ / shares in Units, $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2017 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
No. of Options Outstanding (in shares) | shares | 87,605
Aggregate Intrinsic Value (in thousands) | $ | $ 2,170
No. of Options Currently Exercisable (in shares) | shares | 7,887
Aggregate Intrinsic Value of Options Currently Exercisable (in thousands) | $ | $ 272
$30.00 - $34.99 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
No. of Options Outstanding (in shares) | shares | 500
Weighted-Average Exercise Price (in dollars per share) | $ 30.38
Weighted-Average Remaining Contractual Life (Years) | 1 year 1 month
Aggregate Intrinsic Value (in thousands) | $ | $ 21
No. of Options Currently Exercisable (in shares) | shares | 500
Weighted-Average Exercise Price of Options Currently Exercisable (in dollars per share) | $ 30.38
Weighted-Average Remaining Contractual Life (Years) | 1 year 1 month
Aggregate Intrinsic Value of Options Currently Exercisable (in thousands) | $ | $ 21
$30.00 - $34.99 | Minimum |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Ranges Of Exercise Prices (in dollars per share) | $ 30
$30.00 - $34.99 | Maximum |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Ranges Of Exercise Prices (in dollars per share) | $ 34.99
35.00 - 39.99 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
No. of Options Outstanding (in shares) | shares | 20,854
Weighted-Average Exercise Price (in dollars per share) | $ 37.13
Weighted-Average Remaining Contractual Life (Years) | 5 years 2 months
Aggregate Intrinsic Value (in thousands) | $ | $ 725
No. of Options Currently Exercisable (in shares) | shares | 5,379
Weighted-Average Exercise Price of Options Currently Exercisable (in dollars per share) | $ 35.39
Weighted-Average Remaining Contractual Life (Years) | 4 years 6 months
Aggregate Intrinsic Value of Options Currently Exercisable (in thousands) | $ | $ 196
35.00 - 39.99 | Minimum |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Ranges Of Exercise Prices (in dollars per share) | $ 35
35.00 - 39.99 | Maximum |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Ranges Of Exercise Prices (in dollars per share) | $ 39.99
40.00 - 44.99 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
No. of Options Outstanding (in shares) | shares | 35,659
Weighted-Average Exercise Price (in dollars per share) | $ 43.95
Weighted-Average Remaining Contractual Life (Years) | 7 years 9 months
Aggregate Intrinsic Value (in thousands) | $ | $ 997
No. of Options Currently Exercisable (in shares) | shares | 2,008
Weighted-Average Exercise Price of Options Currently Exercisable (in dollars per share) | $ 44.43
Weighted-Average Remaining Contractual Life (Years) | 6 years 6 months
Aggregate Intrinsic Value of Options Currently Exercisable (in thousands) | $ | $ 55
40.00 - 44.99 | Minimum |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Ranges Of Exercise Prices (in dollars per share) | $ 40
40.00 - 44.99 | Maximum |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Ranges Of Exercise Prices (in dollars per share) | $ 44.99
45.00 - 49.99 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
No. of Options Outstanding (in shares) | shares | 12,961
Weighted-Average Exercise Price (in dollars per share) | $ 46.61
Weighted-Average Remaining Contractual Life (Years) | 7 years 5 months
Aggregate Intrinsic Value (in thousands) | $ | $ 328
No. of Options Currently Exercisable (in shares) | shares | 0
Weighted-Average Exercise Price of Options Currently Exercisable (in dollars per share) | $ 0.00
Aggregate Intrinsic Value of Options Currently Exercisable (in thousands) | $ | $ 0
45.00 - 49.99 | Minimum |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Ranges Of Exercise Prices (in dollars per share) | $ 45
45.00 - 49.99 | Maximum |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Ranges Of Exercise Prices (in dollars per share) | $ 49.99
50.00 - 70.00 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
No. of Options Outstanding (in shares) | shares | 17,631
Weighted-Average Exercise Price (in dollars per share) | $ 66.32
Weighted-Average Remaining Contractual Life (Years) | 9 years 5 months
Aggregate Intrinsic Value (in thousands) | $ | $ 99
No. of Options Currently Exercisable (in shares) | shares | 0
Weighted-Average Exercise Price of Options Currently Exercisable (in dollars per share) | $ 0.00
Aggregate Intrinsic Value of Options Currently Exercisable (in thousands) | $ | $ 0
50.00 - 70.00 | Minimum |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Ranges Of Exercise Prices (in dollars per share) | $ 50
50.00 - 70.00 | Maximum |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Ranges Of Exercise Prices (in dollars per share) | $ 70

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_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of fully vested and expected to vest options that are exercisable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The number of exercisable share options (fully vested and expected to vest) that may be converted as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition As of the balance sheet date, the weighted-average exercise price (at which grantees can acquire the shares reserved for issuance) for exercisable stock options that are fully vested or expected to vest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of fully vested and expected to vest options outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition As of the balance sheet date, the number of shares into which fully vested and expected to vest stock options outstanding can be converted under the option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition As of the balance sheet date, the weighted-average exercise price for outstanding stock options that are fully vested or expected to vest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Weighted average remaining contractual term for fully vested and expected to vest options that are exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageRemainingContractualTerm1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average remaining contractual term for fully vested and expected to vest options outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=chco_RangesOfExercisePricesThirtyPointZeroToThirtyFourPointNinetyNineMemberDomainDomain
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=chco_RangesOfExercisePricesThirtyFivePointZeroToThirtyNinePointNinetyNineMemberDomainDomain
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=chco_RangesOfExercisePricesFortyPointZeroToFortyFourPointNinetyNineMemberDomainDomain
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=chco_RangesOfExercisePricesFortyFivePointZeroToFiftyPointZeroMemberDomainDomain
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=chco_RangesOfExercisePricesFiftyPointZeroToSeventyPointZeroMemberDomainDomainDomain
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |