XML 43 R30.htm IDEA: XBRL DOCUMENT v3.7.0.1
1. Basis of Presentation and Use of Estimates Organization, Consolidation and Presentation of Financial Statements (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Jan. 01, 2017
Dec. 31, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Restricted Cash and Cash Equivalents, Current $ 2,000   $ 2,000
Retained earnings 1,848,337   1,836,180
Additional paid-in-capital $ 342,584   $ 332,911
Adjustments for New Accounting Pronouncement [Member]      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Retained earnings   $ (300)  
Additional paid-in-capital   400  
Deferred Tax Assets, Gross   $ 100