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Business Segments Business Segments - Assets (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
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Segment Reporting Information [Line Items] |  |
Deposits on real estate under option or contract | $ 32,122 | $ 32,556
Inventory | 1,719,403 | 1,382,018
Investment in joint venture arrangements | 24,568 | 20,525
Other assets | 282,242 | 429,672
Total assets | 2,058,335 | 1,864,771
Midwest Homebuilding [Member] |  |
Segment Reporting Information [Line Items] |  |
Deposits on real estate under option or contract | 5,480 | 4,933
Inventory | 716,502 | 500,671
Investment in joint venture arrangements | 534 | 4,410
Other assets | 27,820 | 13,573
Total assets | 750,336 | 523,587
Southern Homebuilding [Member] |  |
Segment Reporting Information [Line Items] |  |
Deposits on real estate under option or contract | 20,194 | 20,719
Inventory | 736,966 | 636,019
Investment in joint venture arrangements | 5,342 | 9,677
Other assets | 46,036 | 38,784
Total assets | 808,538 | 705,199
Mid-Atlantic Homebuilding [Member] |  |
Segment Reporting Information [Line Items] |  |
Deposits on real estate under option or contract | 6,448 | 6,904
Inventory | 265,935 | 245,328
Investment in joint venture arrangements | 18,692 | 6,438
Other assets | 8,331 | 13,311
Total assets | 299,406 | 271,981
Corporate, Financial Services and Unallocated [Member] |  |
Segment Reporting Information [Line Items] |  |
Deposits on real estate under option or contract | 0 | 0
Inventory | 0 | 0
Investment in joint venture arrangements | 0 | 0
Other assets | 200,055 | 364,004
Total assets | $ 200,055 | $ 364,004

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- Definition Inventory - Segments, which includes single-family lots, land and land development costs; land held for sale; homes under construction; model homes and furnishings; community development district infrastructure; and consolidated inventory not owned. + References No definition available. + Details
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- Definition The aggregate carrying amounts, as of the balance sheet date, of assets not separately disclosed in the balance sheet including cash and cash equivalents, restricted cash, property and equipment - net, and mortgage loans held for sale. + References No definition available. + Details
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- Definition Carrying value of capitalized payments made in advance for inventory that is expected to be received within one year or the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.8) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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