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Merger accounting - Summary of Merger Related Costs (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Merger Related Items [Line Items] |  |  |
Merger related costs | $ 0 | $ 1,725 | $ 4,609
Accounting [Member] |  |  |
Merger Related Items [Line Items] |  |  |
Merger related costs |  | 258 | 65
Legal and Consulting [Member] |  |  |
Merger Related Items [Line Items] |  |  |
Merger related costs |  | 85 | 1,011
Salaries and Benefits [Member] |  |  |
Merger Related Items [Line Items] |  |  |
Merger related costs |  | 459 | 1,851
Equipment Disposition and Contract Termination [Member] |  |  |
Merger Related Items [Line Items] |  |  |
Merger related costs |  | 440 | 709
System Conversion/Deconversion Costs [Member] |  |  |
Merger Related Items [Line Items] |  |  |
Merger related costs |  | 278 | 956
Other [Member] |  |  |
Merger Related Items [Line Items] |  |  |
Merger related costs |  | $ 205 | $ 17

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- Definition Merger Related Items [Line Items] + References No definition available. + Details
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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=34752592&loc=d3e1043-128460 + Details
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- Details
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- Details
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- Details
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- Details
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- Details
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