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Business Segments Business Segments (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue | $ 722,485 | $ 567,842 | $ 558,098 | $ 437,857 | $ 621,702 | $ 476,423 | $ 456,866 | $ 406,980 | $ 2,286,282 | $ 1,961,971 | $ 1,691,327
Operating income (loss): |  |  |  |  |  |  |  |  | 163,161 | 138,659 | 108,743
Interest |  |  |  |  |  |  |  |  | 20,484 | 18,874 | 17,598
Equity in income from joint venture arrangements |  |  |  |  |  |  |  |  | (312) | (539) | (640)
Acquisition and integration costs |  |  |  |  |  |  |  |  | 1,700 | 0 | 0
Income before income taxes |  |  |  |  |  |  |  |  | 141,289 | 120,324 | 91,785
Depreciation and amortization: |  |  |  |  |  |  |  |  | 14,531 | 14,174 | 13,606
Midwest Homebuilding [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 933,119 | 742,577 | 637,894
Operating income (loss): |  |  |  |  |  |  |  |  | 86,131 | 81,522 | 70,446
Interest |  |  |  |  |  |  |  |  | 7,142 | 5,010 | 3,754
Depreciation and amortization: |  |  |  |  |  |  |  |  | 2,448 | 2,069 | 1,752
Southern Homebuilding [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 925,404 | 730,482 | 602,273
Operating income (loss): |  |  |  |  |  |  |  |  | 72,600 | 36,798 | 20,398
Interest |  |  |  |  |  |  |  |  | 7,362 | 8,508 | 8,039
Depreciation and amortization: |  |  |  |  |  |  |  |  | 3,210 | 3,014 | 2,525
Mid-Atlantic Homebuilding [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 375,563 | 439,219 | 409,149
Operating income (loss): |  |  |  |  |  |  |  |  | 23,312 | 35,598 | 33,450
Interest |  |  |  |  |  |  |  |  | 2,711 | 2,599 | 3,693
Depreciation and amortization: |  |  |  |  |  |  |  |  | 1,262 | 1,565 | 1,645
Financial Services [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 52,196 | 49,693 | 42,011
Operating income (loss): |  |  |  |  |  |  |  |  | 27,482 | 27,288 | 23,262
Interest |  |  |  |  |  |  |  |  | 3,269 | 2,757 | 2,112
Depreciation and amortization: |  |  |  |  |  |  |  |  | 1,281 | 1,503 | 1,948
Corporate and Other [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Less: Corporate selling, general and administrative expenses |  |  |  |  |  |  |  |  | (46,364) | (42,547) | (38,813)
Depreciation and amortization: |  |  |  |  |  |  |  |  | $ 6,330 | $ 6,023 | $ 5,736

X
- 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=84229725&loc=d3e1043-128460 + Details
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- Definition This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(12)) -URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(10)) -URI http://asc.fasb.org/extlink&oid=114873790&loc=SL114874131-224263 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(13)(f)) -URI http://asc.fasb.org/extlink&oid=114873765&loc=SL114874048-224260 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=109237563&loc=d3e33749-111570 + Details
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- Definition The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -SubTopic 10 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=68048583&loc=d3e3636-108311 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227 + Details
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