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Loans and Allowance for Loan Losses Loans and Allowance for Loan Losses, Part III (PCI Loans) (Details) - USD ($)	Sep. 30, 2016	Sep. 08, 2016	Dec. 31, 2015	Sep. 30, 2015
Carrying Amount [Abstract]
Allowance for loan losses				$ 0
Carrying amount, net of allowance	$ 1,787,000,000		$ 1,266,345,000
Receivables Acquired with Deteriorated Credit Quality [Member]
Carrying Amount [Abstract]
Carrying amount	8,668,000		0	0
Allowance for loan losses	0		0	$ 0
Carrying amount, net of allowance	8,668,000		0
Contractual Payments at Acquisition [Abstract]
Contractually required payments		$ 10,650,000
Non-accretable difference		(1,962,000)
Cash flows expected to be collected at acquisition		8,688,000
Accretable yield		0
Fair value of acquired loans at acquisition		$ 8,688,000
1-4 Family residential properties | Receivables Acquired with Deteriorated Credit Quality [Member]
Carrying Amount [Abstract]
Carrying amount	1,310,000		0
Multifamily residential properties | Receivables Acquired with Deteriorated Credit Quality [Member]
Carrying Amount [Abstract]
Carrying amount	3,430,000		0
Commercial real estate | Receivables Acquired with Deteriorated Credit Quality [Member]
Carrying Amount [Abstract]
Carrying amount	3,897,000		0
Loans secured by real estate | Receivables Acquired with Deteriorated Credit Quality [Member]
Carrying Amount [Abstract]
Carrying amount	8,637,000		0
Commercial and industrial loans | Receivables Acquired with Deteriorated Credit Quality [Member]
Carrying Amount [Abstract]
Carrying amount	$ 31,000		$ 0

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Carrying Amount [Abstract]

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The aggregate deficiency of a loan's cash flows expected to be collected over the investor's initial investment in the loan. This relates to loans with deteriorating of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.

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Contractual Payments at Acquisition [Abstract]

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For receivables acquired in a business combination, excluding certain loans and debt securities acquired in a transfer (as defined), this element represents the fair value of the receivables acquired, by major class of receivable, such as loans, direct finance leases (as defined), and any other class of receivables.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)(1)
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For receivables acquired in a business combination, excluding certain loans and debt securities acquired in a transfer (as defined), this element represents the gross contractual amounts receivable, by major class of receivable, such as loans, direct finance leases (as defined), and any other class of receivables.

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-Publisher FASB
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-Section 50
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The aggregate excess of a loan's cash flows expected to be collected over the investor's initial investment in the loan. This relates to loans with deteriorating of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.

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Amount of cash flows expected to be collected at acquisition of acquired loans not accounted for as debt securities with evidence of deterioration of credit quality.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 30
-Section 50
-Paragraph 2
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A valuation allowance for financing receivables that are expected to be uncollectible.

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-SubTopic 10
-Section 50
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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

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Net amount of the investment in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position. Examples include, but are not limited to, credit card receivables, notes receivable and receivables relating to lessor's rights to payments from leases other than operating leases that have been recorded as assets. Excludes trade accounts receivable with contractual maturity of one year or less and arose from the sale of goods or services.

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