| **Commitments and Contingencies**                       | 12 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
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| **Commitments and Contingencies Disclosure [Abstract]** |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
| Commitments and Contingencies                           | Commitments and ContingenciesFrom time to time, we are subject to various claims, lawsuits, disputes with third parties, investigations and pending actions involving various allegations against us incident to the operation of our business.  In management's opinion, there are no proceedings pending to which we are a party or to which our property is subject, which, if determined adversely to us, would be material in relation to our shareholder's equity or financial condition.  In addition, no material proceedings are pending or are known to be threatened or contemplated against us by governmental authorities or other parties.COB leases certain facilities and equipment for use in its business. The lease for facilities generally runs for periods of 5 to 10 years with various renewal options, while leases for equipment generally have terms not in excess of 5 years. The majority of the leases for facilities contain rental escalation clauses tied to changes in price indices. Certain real property leases contain purchase options. Management expects that most leases will be renewed or replaced with new leases in the normal course of business.Future obligations at December 31, 2014 for minimum rentals under non-cancelable operating lease commitments, primarily relating to premises, are as follows: (dollars in thousands) Year ending December 31, 2015$2,02820161,87720171,46720181,27020191,215Thereafter9,658Total lease commitments$17,515Net rental expense for all operating leases amounted to $2.1 million, $2.2 million, and $2.2 million for the years ended December 31, 2014, 2013 and 2012, respectively. |

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| - Definition
The entire disclosure for commitments and contingencies.
+ References
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