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Intangible Assets and Goodwill (Tables) | 12 Months Ended
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Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items] |
Schedule of Finite-Lived Intangible Assets [Table Text Block] |
| 2015
| Amortization period (years) |  | Gross Amount |  | Accumulated Amortization |  | Net intangible assets
|  |  | (in thousands)
Customer relationships | 20 |  | $ | 7,600 |  |  | $ | 807 |  |  | $ | 6,793 |
Tradename | 6 |  | 7,400 |  |  | 2,620 |  |  | 4,780 |
Covenants not to compete | 10 |  | 3,100 |  |  | 660 |  |  | 2,440 |
Real estate options | 2.2 |  | 942 |  |  | 942 |  |  | — |
|  |  | $ | 19,042 |  |  | $ | 5,029 |  |  | $ | 14,013 |
| 2014
| Amortization period (years) |  | Gross Amount |  | Accumulated Amortization |  | Net intangible assets
|  |  | (in thousands)
Customer relationships | 20 |  | $ | 7,600 |  |  | $ | 428 |  |  | $ | 7,172 |
Tradename | 6 |  | 7,400 |  |  | 1,388 |  |  | 6,012 |
Covenants not to compete | 10 |  | 3,100 |  |  | 351 |  |  | 2,749 |
Real estate options | 2.2 |  | 942 |  |  | 495 |  |  | 447 |
|  |  | $ | 19,042 |  |  | $ | 2,662 |  |  | $ | 16,380 |
Schedule of Goodwill [Table Text Block] | Changes in carrying amount of goodwill were as follows:
| (in thousands)
Balance at January 1, 2014 | 98,686 |
Acquisition adjustments | 1,526 |
Balance at December 31, 2014 | 100,212 |
Acquisition adjustments | — |
Balance at December 31, 2015 | $ | 100,212 |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275 + Details
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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 + Details
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