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Condensed Consolidating Statement of Cash Flows (Unaudited) (Detail) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Condensed Financial Statements, Captions [Line Items]    
Net cash provided by operating activities $ 166,622 $ 183,651
Net cash used in investing activities (146,078) (96,093)
Net cash provided by (used in) financing activities (7,786) (63,210)
NET INCREASE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH 12,758 24,348
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, beginning of period 74,137 52,183
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, end of period 86,895 76,531
Reportable Legal Entities | Parent    
Condensed Financial Statements, Captions [Line Items]    
Net cash provided by operating activities 122,947 161,685
Net cash used in investing activities (11,326) (69,202)
Net cash provided by (used in) financing activities (100,998) (76,236)
NET INCREASE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH 10,623 16,247
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, beginning of period 11,109 25,745
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, end of period 21,732 41,992
Reportable Legal Entities | Combined Subsidiary Guarantors    
Condensed Financial Statements, Captions [Line Items]    
Net cash provided by operating activities 36,783 21,697
Net cash used in investing activities (76,563) (20,221)
Net cash provided by (used in) financing activities 33,748 1,462
NET INCREASE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH (6,032) 2,938
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, beginning of period 40,348 26,438
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, end of period 34,316 29,376
Reportable Legal Entities | Non-Guarantor Subsidiaries    
Condensed Financial Statements, Captions [Line Items]    
Net cash provided by operating activities 6,892 269
Net cash used in investing activities (58,189) (6,670)
Net cash provided by (used in) financing activities 59,464 11,564
NET INCREASE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH 8,167 5,163
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, beginning of period 22,680  
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, end of period $ 30,847 $ 5,163