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Consolidated Statements of Changes in Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands | Total | Common Stock [Member] | Retained Earnings [Member] | Noncontrolling Interest [Member] | Stockholders' Equity, Total [Member] | Treasury Stock [Member]
--- | --- | --- | --- | --- | --- | ---
Accumulated other comprehensive loss | $ (31,413) |  |  |  |  |
Treasury Stock, Shares | 35,355 |  |  |  |  |
Treasury Stock, Value | $ (512,579) |  |  |  |  |
Noncontrolling interest | 259 |  |  |  |  |
Common stock – $.0001 par value, 135,000 shares authorized, 131,991 and 130,960 shares issued, 85,715 and 88,047 shares outstanding | 6 |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Additional paid-in capital | 325,548 |  |  |  |  |
Retained earnings | $ 896,842 |  |  |  |  |
Exercise of stock options (in Shares) | 1,119 |  |  |  |  |
Exercise of stock options | $ 10,713 | $ 0 |  |  |  |
Issuance of fully vested restricted stock (in Shares) | 612 |  |  |  |  |
Stock-based compensation | $ 19,509 |  |  |  |  |
Payments to Acquire Businesses, Gross |  |  |  | $ (2,327) |  |
Unrealized holding gain on marketable securities net of taxes | 1,303 |  |  |  |  |
Unrealized Gain (Loss) on Cash Flow Hedging Instruments | 506 |  |  |  |  |
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders | (417) |  |  |  |  |
Noncontrolling Interest, Increase from Business Combination | (2,327) |  |  |  |  |
Net loss attributable to noncontrolling interests | 363 |  |  |  |  |
Foreign currency translation adjustment | $ (2,147) |  |  |  |  |
Balance (in Shares) at Dec. 31, 2015 | 92,540 |  |  |  |  |
Balance (in Shares) at Dec. 31, 2016 | 90,615 |  |  |  |  |
Balance at Dec. 31, 2015 |  |  |  |  | $ 678,663 |
Balance at Dec. 31, 2016 |  |  |  |  | 741,072 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Stock Repurchased During Period, Shares | (3,656) |  |  |  |  |
Payments for Repurchase of Common Stock | $ (86,005) |  |  |  |  | $ (86,005)
Payments for Repurchase of Common Stock | 0 |  |  |  |  |
Net Income (Loss) Attributable to Parent |  |  | $ 120,911 |  |  |
Accumulated other comprehensive loss | $ (31,751) |  |  |  |  |
Treasury Stock, Shares | 39,011 |  |  |  |  |
Treasury Stock, Value | $ (598,584) |  |  |  |  |
Noncontrolling interest | 205 |  |  |  |  |
Common stock – $.0001 par value, 135,000 shares authorized, 131,991 and 130,960 shares issued, 85,715 and 88,047 shares outstanding | 6 |  |  |  |  |
Additional paid-in capital | 353,443 |  |  |  |  |
Retained earnings | $ 1,017,753 |  |  |  |  |
Exercise of stock options (in Shares) | 983 |  |  |  |  |
Exercise of stock options | $ 16,433 |  |  |  |  |
Issuance of fully vested restricted stock (in Shares) | 351 |  |  |  |  |
Stock-based compensation | $ 20,847 |  |  |  |  |
Unrealized holding gain on marketable securities net of taxes | 116 |  |  |  |  |
Unrealized Gain (Loss) on Cash Flow Hedging Instruments | (814) |  |  |  |  |
Noncontrolling Interest, Increase from Business Combination | 4,716 |  |  |  |  |
Net loss attributable to noncontrolling interests | 1,190 |  |  |  |  |
Foreign currency translation adjustment | $ 6,836 |  |  |  |  |
Balance (in Shares) at Dec. 31, 2017 | 88,047 |  |  |  |  |
Balance at Dec. 31, 2017 | $ 808,932 |  |  |  | 808,932 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Stock Repurchased During Period, Shares | 3,902 |  |  |  |  |
Payments for Repurchase of Common Stock | $ (99,412) |  |  |  |  | 99,412
Payments for Repurchase of Common Stock | 0 |  |  |  |  |
Net Income (Loss) Attributable to Parent | 117,948 |  | $ 117,948 |  |  |
Accumulated other comprehensive loss | $ (25,613) |  |  |  |  |
Treasury Stock, Shares | 42,913 |  |  |  |  |
Treasury Stock, Value | $ (697,996) |  |  |  |  |
Noncontrolling interest | 6,111 |  |  |  |  |
Common stock – $.0001 par value, 135,000 shares authorized, 131,991 and 130,960 shares issued, 85,715 and 88,047 shares outstanding | 6 |  |  |  |  |
Noncontrolling Interest in Operating Partnerships | 4,716 |  |  |  |  |
Additional paid-in capital | 390,723 |  |  |  |  |
Retained earnings | $ 1,135,701 |  |  |  |  |
Exercise of stock options (in Shares) | 593 |  |  |  |  |
Exercise of stock options | $ 13,036 |  |  |  |  |
Issuance of fully vested restricted stock (in Shares) | 438 |  |  |  |  |
Stock-based compensation | $ 21,076 |  |  |  |  |
Dividends, Common Stock, Cash | (47,316) |  |  |  |  |
Unrealized holding gain on marketable securities net of taxes | 94 |  |  |  |  |
Unrealized Gain (Loss) on Cash Flow Hedging Instruments | 874 |  |  |  |  |
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders | (1,183) |  |  |  |  |
Noncontrolling Interest, Increase from Business Combination | 2,577 |  |  |  |  |
Net loss attributable to noncontrolling interests | 1,363 |  |  |  |  |
Foreign currency translation adjustment | $ (7,983) |  |  |  |  |
Balance (in Shares) at Dec. 31, 2018 | 85,715 |  |  |  |  |
Balance at Dec. 31, 2018 | $ 814,682 |  |  |  | $ 814,682 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Stock Repurchased During Period, Shares | (3,363) |  |  |  |  |
Payments for Repurchase of Common Stock | $ (105,924) |  |  |  |  | $ 105,924
Payments for Repurchase of Common Stock | 0 |  |  |  |  |
Net Income (Loss) Attributable to Parent | 129,136 |  |  |  |  |
Accumulated other comprehensive loss | $ (32,628) |  |  |  |  |
Treasury Stock, Shares | 46,276 |  |  |  |  |
Treasury Stock, Value | $ (803,920) |  |  |  |  |
Noncontrolling interest | 8,868 |  |  |  |  |
Common stock – $.0001 par value, 135,000 shares authorized, 131,991 and 130,960 shares issued, 85,715 and 88,047 shares outstanding | 6 |  |  |  |  |
Noncontrolling Interest in Operating Partnerships | 2,577 |  |  |  |  |
Additional paid-in capital | 424,835 |  |  |  |  |
Retained earnings | $ 1,217,521 |  |  |  |  |

X
- Definition Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e637-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e681-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580 + Details
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- Definition Excess of issue price over par or stated value of the entity's capital stock and amounts received from other transactions involving the entity's stock or stockholders. Includes adjustments to additional paid in capital. Some examples of such adjustments include recording the issuance of debt with a beneficial conversion feature and certain tax consequences of equity instruments awarded to employees. Use this element for the aggregate amount of additional paid-in capital associated with common and preferred stock. For additional paid-in capital associated with only common stock, use the element additional paid in capital, common stock. For additional paid-in capital associated with only preferred stock, use the element additional paid in capital, preferred stock. + 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(30)(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity. + 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(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount of paid and unpaid common stock dividends declared with the form of settlement in cash. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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- Definition The aggregate net change in the difference between the fair value and the carrying value, or in the comparative fair values, of marketable securities categorized as trading held at each balance sheet date, that was included in earnings for the period, which may have arisen from (a) securities classified as trading, (b) the unrealized holding gain (loss) on held-to-maturity securities transferred to the trading security category, and (c) the cumulative unrealized gain (loss) which was included in other comprehensive income (a separate component of shareholders' equity) on available-for-sale securities transferred to trading securities during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27357-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27405-111563 + Details
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- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which is directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent (that is, noncontrolling interest, previously referred to as minority interest). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(22)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(24)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.31) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Decrease in noncontrolling interest balance from payment of dividends or other distributions by the non-wholly owned subsidiary or partially owned entity, included in the consolidation of the parent entity, to the noncontrolling interest holders. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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- Definition Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 20 -Subparagraph (b,c) -URI http://asc.fasb.org/extlink&oid=64808268&loc=d3e32211-110900 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669646-108580 + Details
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- Definition The cash outflow to reacquire common stock during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585 + Details
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- Definition Number of shares issued which are neither cancelled nor held in the treasury. + References No definition available. + Details
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- Definition Number of shares issued during the period related to Restricted Stock Awards, net of any shares forfeited. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 2: 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(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21463-112644 Reference 4: 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(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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