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Stockholders' Equity - Summary of Unaudited Pro-Forma Adjustments to Consolidated Balance Sheet (Detail) - USD ($) $ in Thousands | Sep. 30, 2015 | Dec. 31, 2014
--- | --- | ---
Condensed Balance Sheet Statements Captions [Line Items] |  |
Total assets | $ 1,078,366 | $ 911,774
Total liabilities | $ 795,412 | 692,858
Contingently redeemable common stock |  | $ 19,000
STOCKHOLDERS' EQUITY: |  |
Cumulative convertible preferred stock, $.01 par value |  |
Common stock, $.01 par value | $ 456 | $ 448
Treasury shares, at cost | (69,818) | (62,153)
Additional paid-in capital | 67,845 | 40,987
Accumulated other comprehensive income (loss), net of taxes | (2,515) | (1,835)
Retained earnings | 286,986 | 222,469
Total stockholders' equity | 282,954 | 199,916
Total liabilities, contingently redeemable common stock and stockholders' equity | $ 1,078,366 | 911,774
Pro-Forma Adjustment [Member] |  |
Condensed Balance Sheet Statements Captions [Line Items] |  |
Contingently redeemable common stock |  | $ (19,000)
STOCKHOLDERS' EQUITY: |  |
Cumulative convertible preferred stock, $.01 par value |  |
Additional paid-in capital |  | $ 19,000
Total stockholders' equity |  | 19,000
Pro-Forma [Member] |  |
Condensed Balance Sheet Statements Captions [Line Items] |  |
Total assets |  | 911,774
Total liabilities |  | $ 692,858
STOCKHOLDERS' EQUITY: |  |
Cumulative convertible preferred stock, $.01 par value |  |
Common stock, $.01 par value |  | $ 448
Treasury shares, at cost |  | (62,153)
Additional paid-in capital |  | 59,987
Accumulated other comprehensive income (loss), net of taxes |  | (1,835)
Retained earnings |  | 222,469
Total stockholders' equity |  | 218,916
Total liabilities, contingently redeemable common stock and stockholders' equity |  | $ 911,774

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- 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=36458714&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=36458714&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=36458714&loc=SL7669686-108580 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 31 -Article 5 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 + 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 31 -Article 5 + Details
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- Definition Carrying amount, attributable to parent, of an entity's issued and outstanding stock which is not included within permanent equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. Includes stock with a put option held by an ESOP and stock redeemable by a holder only in the event of a change in control of the issuer. + References No definition available. + Details
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