Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies (Details 3)

v3.10.0.1
Summary of Significant Accounting Policies (Details 3) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Net cash provided by operating activities $ 180,482 $ 230,121 $ 234,270
Net cash used in investing activities (232,918) (89,363) 71,174
Net cash used in financing activities 49,555 (338,546) (155,088)
Net decrease in cash and cash equivalents and restricted cash (2,881) (197,788) 150,356
Beginning of year 14,831 212,619 62,263
End of year 11,950 14,831 212,619
Accounting Standards Update 2016-18 and 2016-15 [Member]      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Net cash provided by operating activities   (533) 1,732
Net cash used in investing activities   347 (275)
Net cash used in financing activities   0 (654)
Net decrease in cash and cash equivalents and restricted cash   (186) 803
Beginning of year 2,570 2,756 1,953
End of year   2,570 2,756
Accounting Standards Update 2017-05 [Member]      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Effect of change on net income     18,000
As Previously Reported [Member]      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Net cash provided by operating activities   230,654 232,538
Net cash used in investing activities   (89,710) 71,449
Net cash used in financing activities   (338,546) (154,434)
Net decrease in cash and cash equivalents and restricted cash   (197,602) 149,553
Beginning of year $ 12,261 209,863 60,310
End of year   $ 12,261 $ 209,863