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Stockholders' Equity	12 Months Ended
	Dec. 31, 2018
Federal Home Loan Banks [Abstract]
Stockholders' Equity	15) Stockholders’ Equity Stock Repurchase Program On July 25, 2011, the Company’s Board of Directors approved a share repurchase program for the repurchase of up to an aggregate of $200,000 of its outstanding common stock from time to time in open market purchases, privately negotiated transactions or through other appropriate means. The timing and quantity of any shares repurchased will depend upon a variety of factors, including business conditions, stock market conditions and business development activities, including, but not limited to, merger and acquisition opportunities. These repurchases may be commenced, suspended or discontinued at any time without prior notice. During 2018, the Company repurchased approximately 818,000 shares of its common stock for $75,000 at an average price of $91.67 per share. During 2017, there were no repurchases of common stock. During 2016, the Company repurchased 44,798 shares of its common stock for $1,545 at an average price of $34.50 per share. The Company has repurchased approximately 2,588,000 shares of common stock for approximately $127,000 pursuant to the program since its adoption. Cash Dividends Holders of the Company’s common stock are entitled to receive dividends when and if they are declared by the Company’s Board of Directors. The Company’s Board of Directors declared a cash dividend of $0.18 per share during the first quarter of 2018 and $0.20 per share during the second, third and fourth quarters of 2018, which totaled $42,405. The Company’s board of directors declared a cash dividend of $0.175 per share during the first, second, and third quarters of 2017, and $0.18 per share during the fourth quarter of 2017, which totaled $38,178. Future dividend declarations, if any, as well as the record and payment dates for such dividends, are subject to the final determination of the Company’s Board of Directors. On February 11, 2019, the Company’s Board of Directors declared a quarterly cash dividend of $0.20 per share to be paid on March 8, 2019 to Stockholders of record as of February 25, 2019.

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- Definition

The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-URI http://asc.fasb.org/topic&trid=2208762

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