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Deferred Compensation Plan (Details) (USD $)
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3 Months Ended | 9 Months Ended | 12 Months Ended | 3 Months Ended | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Sep. 30, 2014
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Sep. 30, 2013
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Sep. 30, 2014
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Sep. 30, 2013
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Dec. 31, 2013
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Aug. 01, 2013
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May 09, 2014
Subordinated Debt [Member]
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Mar. 31, 2014
Subordinated Debt [Member]
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Feb. 21, 2014
Subordinated Debt [Member]
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Jan. 22, 2014
Subordinated Debt [Member]
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Oct. 18, 2013
Subordinated Debt [Member]
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Aug. 01, 2013
Subordinated Debt [Member]
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Mar. 08, 2013
Subordinated Debt [Member]
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Mar. 10, 2010
Subordinated Debt [Member]
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Sep. 30, 2014
2014 [Member]
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Sep. 30, 2014
2015 through 2017 [Member]
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Mar. 31, 2016
Scenario, Actual [Member]
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| Debt Instrument, Repurchased Face Amount | $ 42,500,000 | $ 50,000,000 | $ 20,000,000 | $ 30,000,000 | $ 155,000,000 | $ 324,000,000 | $ 50,000,000 | $ 28,500,000 | |||||||||
| RDU Plan, units authorized for issuance | 28,500 | 28,500 | |||||||||||||||
| RDU Plan, units outstanding | 28,500 | 28,500 | |||||||||||||||
| Deferred Compensation Arrangement with Individual, Requisite Service Period | 3 years 0 months 0 days | ||||||||||||||||
| Redemption premium added to debt face amount, RDU plan | 100,000 | 1,400,000 | |||||||||||||||
| RDU plan cash retention pool | 15,000,000 | ||||||||||||||||
| Charge for payment of RDU Plan cash retention pool | 0 | 7,500,000 | 0 | 7,500,000 | 7,500,000 | ||||||||||||
| Second RDU Cash Retention Payment | 7,500,000 | ||||||||||||||||
| RDU Plan, unrecognized compensation expense | 2,000,000 | 7,000,000 | |||||||||||||||
| RDU Plan, compensation expense | 2,200,000 | 10,400,000 | 6,600,000 | 14,700,000 | |||||||||||||
| RDU Plan, liability | $ 28,200,000 | $ 28,200,000 | $ 21,800,000 | ||||||||||||||