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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2015
Accounting Policies [Abstract] |
Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block] | he below financial statement line items, reflected on the December 31, 2014 Consolidated Balance Sheets, were affected by the change in accounting principle.
| Balance Sheet As of December 31, 2014
(In thousands) | As Previously Reported |  | Adjustment |  | As Adjusted
Other assets | $ | 43,870 |  |  | $ | (6,171 | ) |  | $ | 37,699 |
Total assets | $ | 1,211,410 |  |  | $ | (6,171 | ) |  | $ | 1,205,239 |
Convertible senior subordinated notes due 2017 - net | $ | 57,500 |  |  | $ | (1,557 | ) |  | $ | 55,943 |
Convertible senior subordinated notes due 2018 - net | $ | 86,250 |  |  | $ | (2,244 | ) |  | $ | 84,006 |
Senior notes - net | $ | 228,469 |  |  | $ | (2,370 | ) |  | $ | 226,099 |
Total liabilities | $ | 667,115 |  |  | $ | (6,171 | ) |  | $ | 660,944 |
Property, Plant and Equipment [Table Text Block] | Following are the major classes of depreciable assets and their estimated useful lives:
| Year Ended December 31,
| 2015 |  | 2014
Land, building and improvements | $ | 11,823 |  |  | $ | 11,823 |
Office furnishings, leasehold improvements, computer equipment and computer software | 25,676 |  |  | 24,281 |
Transportation and construction equipment | 102 |  |  | 156 |
Property and equipment | 37,601 |  |  | 36,260 |
Accumulated depreciation | (24,704 | ) |  | (24,771 | )
Property and equipment, net | $ | 12,897 |  |  | $ | 11,490 |
| Estimated Useful Lives
Building and improvements | 35 years
Office furnishings, leasehold improvements, computer equipment and computer software | 3-7 years
Transportation and construction equipment | 5-7 years
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block] | The summary of capitalized interest for the years ended December 31, 2015, 2014 and 2013 is as follows:
| Year Ended December 31,
(In thousands) | 2015 |  | 2014 |  | 2013
Capitalized interest, beginning of period | $ | 15,296 |  |  | $ | 13,802 |  |  | $ | 15,376 |
Interest capitalized to inventory | 18,410 |  |  | 17,937 |  |  | 13,601 |
Capitalized interest charged to cost of sales | (16,966 | ) |  | (16,443 | ) |  | (15,175 | )
Capitalized interest, end of year | $ | 16,740 |  |  | $ | 15,296 |  |  | $ | 13,802 |
Interest incurred | $ | 35,931 |  |  | $ | 31,302 |  |  | $ | 29,539 |

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- Definition Tabular disclosure of the amounts paid in advance for capitalized costs that will be expensed with the passage of time or the occurrence of a triggering event, and will be charged against earnings within one year or the normal operating cycle, if longer; the aggregate carrying amount of current assets, not separately presented elsewhere in the balance sheet; and other deferred costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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