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Acquisition - Summary (Details) - USD ($) $ in Thousands | Dec. 02, 2016 | Oct. 01, 2015 | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | --- | --- | ---
Fair Value of Liabilities Assumed |  |  |  |
Goodwill |  |  | $ 186,483 | $ 164,500
First Community Bank |  |  |  |
Consideration Paid |  |  |  |
Cash Paid to shareholders |  | $ 14,750 |  |
Total consideration paid |  | 14,750 |  |
Fair Value of Assets Acquired |  |  |  |
Cash and cash equivalents |  | 11,217 |  |
Investment Securities |  | 25,980 |  |
FHLB Stock |  | 832 |  |
Loans |  | 61,173 |  |
Premises and other equipment |  | 1,801 |  |
Core deposit intangible |  | 172 |  |
Other real estate |  | 816 |  |
Other assets |  | 1,115 |  |
Total assets acquired |  | 103,106 |  |
Fair Value of Liabilities Assumed |  |  |  |
Deposits |  | 90,311 |  |
Other Liabilities |  | 1,115 |  |
Total liabilities assumed |  | 91,426 |  |
Total Fair Value of Identifiable Net Assets |  | 11,680 |  |
Goodwill |  | $ 3,070 |  |
FirstMerit Bank, NA, Branch Acquisition [Member] |  |  |  |
Consideration Paid |  |  |  |
Cash Paid to shareholders | $ (476,555) |  |  |
Total consideration paid | (476,555) |  |  |
Fair Value of Assets Acquired |  |  |  |
Cash and cash equivalents | 2,914 |  |  |
Loans | 102,097 |  |  |
Premises and other equipment | 4,562 |  |  |
Core deposit intangible | 11,330 |  |  |
Other assets | 294 |  |  |
Total assets acquired | 121,197 |  |  |
Fair Value of Liabilities Assumed |  |  |  |
Deposits | 619,729 |  |  |
Other Liabilities | 70 |  |  |
Total liabilities assumed | 619,799 |  |  |
Total Fair Value of Identifiable Net Assets | (498,602) |  |  |
Goodwill | $ 22,047 |  |  |

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- Definition 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) -URI http://asc.fasb.org/extlink&oid=73530397&loc=d3e4845-128472 + Details
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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions, acquired at the acquisition date. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + 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 (c) -URI http://asc.fasb.org/extlink&oid=73530397&loc=d3e4845-128472 + Details
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- Definition Amount of investments in debt and equity securities, including, but not limited to, held-to-maturity, trading and available-for-sale expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date. + 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 (c) -URI http://asc.fasb.org/extlink&oid=73530397&loc=d3e4845-128472 + Details
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- Definition Amount of liabilities assumed at the acquisition date. + 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 (c) -URI http://asc.fasb.org/extlink&oid=73530397&loc=d3e4845-128472 + Details
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- Definition Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=73531372&loc=d3e2207-128464 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=73530397&loc=d3e4845-128472 + Details
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