Schedule II - Valuation and Qualifying Accounts Schedule II Valuation and Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Allowance for doubtful accounts:
The roll forward of valuation accounts were as follows:
Balance at beginning of period	$ 828	$ 1,637	$ 1,865
Charged to costs and expenses	715	126	1,582
Deductions	(810)	(935)	(1,810)
Balance at end of period	733	828	1,637
Valuation allowance for deferred tax assets:
The roll forward of valuation accounts were as follows:
Balance at beginning of period	35,834	34,278	938
Charged to costs and expenses	841	1,556	33,340
Deductions	0	0	0
Balance at end of period	$ 36,675	$ 35,834	$ 34,278

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Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 09

-Article 12

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Total of the deductions in a given period to allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, representing receivables written off as uncollectible and portions of the reserves utilized, respectively.

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