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Subsequent Events (Details) |  |  | 9 Months Ended |  |
--- | --- | --- | --- | --- | ---
Oct. 30, 2017 | Oct. 04, 2017 USD ($) | Sep. 30, 2017 USD ($) item | Oct. 27, 2017 USD ($) | Dec. 31, 2016 USD ($)
Subsequent Event [Line Items] |  |  |  |  |
Number of types of subsequent events | item |  |  | 2 |  |
Long-term Debt |  |  | $ 796,609,000 |  | $ 795,891,000
Stated interest rate |  |  | 4.25% |  |
Debt instrument, maturity date |  |  | Dec. 31, 2024 |  |
Subsequent Event [Member] | Ziegler Wealth Management [Member] |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Business acquisition, definitive agreement entered date | Oct. 30, 2017 |  |  |  |
Subsequent Event [Member] | Senior Notes 5.20% due October 2047 [Member] |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Long-term Debt |  | $ 200,000,000 |  |  |
Stated interest rate |  | 5.20% |  |  |
Debt instrument, maturity date |  | Oct. 31, 2047 |  |  |
Redemption price for on or after October 15, 2022, percentage of principal amount |  | 100.00% |  |  |
Debt instrument, principal amount sold pursuant to over-allotment option |  |  |  | $ 25,000,000 |

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- Definition Number of types of subsequent events. + References No definition available. + Details
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- Definition Redemption price, percentage of principal amount. + References No definition available. + Details
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- Definition Date when the business acquisition agreement was executed, in CCYY-MM-DD format. + References No definition available. + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + 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 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format. + 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 210.5-02.22(a)(2)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: 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(a)(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: 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(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
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- Details
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- Details
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