Debt Outstanding [Line Items]

No definition available.

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- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ 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

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+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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+ Details

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- Details

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- Details

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Short-Term Borrowings and Long-Term Debt - Outstanding Short Term Borrowings and Long Term Debt (Details) - USD ($)	Dec. 31, 2019	Dec. 20, 2019	Dec. 31, 2018	Jan. 31, 2015	Sep. 30, 2010
Debt Outstanding [Line Items]
Short-term borrowings	$ 17,430,000		$ 631,412,000
Total long-term debt	$ 347,987,000		$ 696,465,000
3.50% Senior Notes
Debt Outstanding [Line Items]
Principal value				$ 350,000,000
Stated interest rate	3.50%		3.50%
5.375% Senior Notes
Debt Outstanding [Line Items]
Principal value		$ 350,000,000			$ 350,000,000
Stated interest rate	5.375%
Senior Notes \| 3.50% Senior Notes
Debt Outstanding [Line Items]
Principal value	$ 350,000,000
Total long-term debt	347,987,000		$ 347,639,000
Senior Notes \| 5.375% Senior Notes
Debt Outstanding [Line Items]
Total long-term debt	0		$ 348,826,000
Stated interest rate			5.375%
Short-term FHLB advances
Debt Outstanding [Line Items]
Short-term borrowings	0		$ 300,000,000
Securities sold under agreement to repurchase
Debt Outstanding [Line Items]
Short-term borrowings	0		319,414,000
Other short-term borrowings
Debt Outstanding [Line Items]
Principal value	17,430,000
Short-term borrowings	$ 17,430,000		$ 11,998,000