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Condensed Consolidated Statements of Changes in Equity (Unaudited) - USD ($) $ in Thousands | Total | Series D convertible preferred stock | Common Stock | Preferred Stock Series D convertible preferred stock | Additional Paid-in Capital | Accumulated Deficit | Accumulated Other Comprehensive Income (Loss) | Treasury Stock | Total Attributed To Stockholders | Total Attributed To Stockholders Series D convertible preferred stock | Non- controlling Interests
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Cumulative effect adjustment for adoption of ASU | $ 1,052 |  |  |  |  | $ 1,052 |  |  | $ 1,052 |  |
Beginning Balance (in shares) at Dec. 31, 2016 |  |  | 5,889,013 | 0 |  |  |  | 3,230,045 |  |  |
Beginning Balance at Dec. 31, 2016 | 321,673 |  | $ 91 | $ 0 | $ 1,090,331 | (424,279) | $ (224) | $ (344,246) | 321,673 |  | $ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Net income (loss) | 13,027 |  |  |  |  | 13,027 |  |  | 13,027 |  |
Net unrealized gain (loss) on securities available-for-sale | 88 |  |  |  |  |  | 88 |  | 88 |  |
Foreign currency translation adjustments | 0 |  |  |  |  |  |  |  |  |  |
Issuance of stock, net of offering costs (in shares) |  |  | 1,046,500 | 1,150,000 |  |  |  |  |  |  |
Issuance of stock, net of offering costs | 109,320 | $ 110,837 | $ 10 | $ 110,837 | 109,310 |  |  |  | 109,320 | $ 110,837 |
Cash dividends declared, preferred | (2,084) |  |  |  | (2,084) |  |  |  | (2,084) |  |
Cash dividends declared, common | (3,322) |  |  |  | (3,322) |  |  |  | (3,322) |  |
Issuance of common shares related to employee stock transactions (in shares) |  |  | 53,631 |  |  |  |  |  |  |  |
Issuance of common shares related to employee stock transactions | 86 |  | $ 1 |  | 85 |  |  |  | 86 |  |
Taxes paid on stock-based compensation | (2,464) |  |  |  | (2,464) |  |  |  | (2,464) |  |
Stock-based compensation | 4,175 |  |  |  | 4,175 |  |  |  | 4,175 |  |
Ending Balance (in shares) at Mar. 31, 2017 |  |  | 6,989,144 | 1,150,000 |  |  |  | 3,230,045 |  |  |
Ending Balance at Mar. 31, 2017 | 552,388 |  | $ 102 | $ 110,837 | 1,196,031 | (410,200) | (136) | $ (344,246) | 552,388 |  | 0
Beginning Balance at Dec. 31, 2016 | 37,266 |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Redeemable Non-controlling Interests [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Net income (loss) | 718 |  |  |  |  |  |  |  |  |  |
Activity of noncontrolling interests, net | 6,992 |  |  |  |  |  |  |  |  |  |
Ending Balance at Mar. 31, 2017 | 44,976 |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Cumulative effect adjustment for adoption of ASU |  |  |  |  |  | (178) | 178 |  |  |  |
Beginning Balance (in shares) at Dec. 31, 2017 |  |  | 7,159,645 | 1,150,000 |  |  |  | 3,296,289 |  |  |
Beginning Balance at Dec. 31, 2017 | 605,224 |  | $ 105 | $ 110,843 | 1,216,173 | (386,216) | (600) | $ (351,748) | 588,557 |  | 16,667
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Net income (loss) | 23,972 |  |  |  |  | 23,300 |  |  | 23,300 |  | 672
Net unrealized gain (loss) on securities available-for-sale | (249) |  |  |  |  |  | (249) |  | (249) |  |
Foreign currency translation adjustments | 10 |  |  |  |  |  | 10 |  | 10 |  |
Activity of noncontrolling interests, net | (720) |  |  |  |  |  |  |  |  |  | (720)
Cash dividends declared, preferred | (2,084) |  |  |  | (2,084) |  |  |  | (2,084) |  |
Cash dividends declared, common | (3,394) |  |  |  | (3,394) |  |  |  | (3,394) |  |
Issuance of common shares related to employee stock transactions (in shares) |  |  | 57,798 |  |  |  |  |  |  |  |
Issuance of common shares related to employee stock transactions | 698 |  |  |  | 698 |  |  |  | 698 |  |
Taxes paid on stock-based compensation | (5,014) |  |  |  | (5,014) |  |  |  | (5,014) |  |
Stock-based compensation | 6,963 |  |  |  | 6,963 |  |  |  | 6,963 |  |
Ending Balance (in shares) at Mar. 31, 2018 |  |  | 7,217,443 | 1,150,000 |  |  |  | 3,296,289 |  |  |
Ending Balance at Mar. 31, 2018 | 625,406 |  | $ 105 | $ 110,843 | $ 1,213,342 | $ (363,094) | $ (661) | $ (351,748) | $ 608,787 |  | $ 16,619
Beginning Balance at Dec. 31, 2017 | 4,178 |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Redeemable Non-controlling Interests [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Net income (loss) | (145) |  |  |  |  |  |  |  |  |  |
Activity of noncontrolling interests, net | 129 |  |  |  |  |  |  |  |  |  |
Ending Balance at Mar. 31, 2018 | $ 4,162 |  |  |  |  |  |  |  |  |  |

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