Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

+ Details

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- Definition

The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

+ References

No definition available.

+ Details

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- Definition

Total cost of shares repurchased divided by the total number of shares repurchased.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655

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- Definition

The amount allocated to treasury stock. Treasury stock is common and preferred shares of an entity that were issued, repurchased by the entity, and are held in its treasury.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23315-112656

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- Details

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- Details

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- Details

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- Details

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Stockholders' Equity (Shares repurchased under the stock repurchase program) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2016
Equity, Class of Treasury Stock [Line Items]
Treasury Stock, Value	$ 105,379		$ 104,860
April 2015 [Member]
Equity, Class of Treasury Stock [Line Items]
Common shares repurchased as part of the stock repurchase program (Shares)	204,338
Treasury Stock Acquired, Average Cost Per Share	$ 14.38
Treasury Stock, Value	$ 2,939
May 2015 [Member]
Equity, Class of Treasury Stock [Line Items]
Common shares repurchased as part of the stock repurchase program (Shares)	48,200
Treasury Stock Acquired, Average Cost Per Share	$ 13.09
Treasury Stock, Value	$ 631
June 2015 [Member]
Equity, Class of Treasury Stock [Line Items]
Common shares repurchased as part of the stock repurchase program (Shares)	51,447
Treasury Stock Acquired, Average Cost Per Share	$ 12.81
Treasury Stock, Value	$ 659
July 2015 [Member]
Equity, Class of Treasury Stock [Line Items]
Common shares repurchased as part of the stock repurchase program (Shares)	500,000
Treasury Stock Acquired, Average Cost Per Share	$ 9.39
Treasury Stock, Value	$ 4,696
Seventy Millions Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Common shares repurchased as part of the stock repurchase program (Shares)	803,985	1,153,998
Treasury Stock Acquired, Average Cost Per Share	$ 11.1	$ 14.66
Treasury Stock, Value	$ 8,925