Annual report pursuant to Section 13 and 15(d)

Schedule I - Condensed Statement of Cash Flow (Details)

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Schedule I - Condensed Statement of Cash Flow (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Cash flows from operating activities:                      
Net income $ 19,101 $ 26,713 $ 30,574 $ 3,151 $ 28,119 $ 14,185 $ 15,782 $ 214 $ 79,539 $ 58,300 $ 57,603
Adjustments to reconcile net income to net cash provided by operating activities:                      
Stock compensation                 18,225 19,464 8,799
Net cash provided by operating activities                 267,763 248,644 165,173
Cash flows from investing activities:                      
Net cash used in investing activities                 (35,359) (119,290) (195,982)
Cash flows from financing activities:                      
IPO proceeds                 0 0 507,500
IPO costs                 0 0 (26,804)
Net cash (used in) provided by financing activities                 (216,093) (137,225) 19,833
Cash, cash equivalents and restricted cash at beginning of period       57,854       66,195 57,854 66,195  
Cash, cash equivalents and restricted cash at end of period 72,284       57,854       72,284 57,854 66,195
Parent Company                      
Cash flows from operating activities:                      
Net income                 79,539 58,300 57,603
Equity in net income from subsidiaries                 (97,764) (77,764) (66,402)
Adjustments to reconcile net income to net cash provided by operating activities:                      
Stock compensation                 18,225 19,464 8,799
Net cash provided by operating activities                 0 0 0
Cash flows from investing activities:                      
Investment in subsidiaries                 0 0 (480,696)
Net cash used in investing activities                 0 0 (480,696)
Cash flows from financing activities:                      
IPO proceeds                 0 0 507,500
IPO costs                 0 0 (26,804)
Net cash (used in) provided by financing activities                 0 0 480,696
Effect of exchange rate changes on cash, cash equivalents and restricted cash                 0 0 0
Net change in cash, cash equivalents and restricted cash                 0 0 0
Cash, cash equivalents and restricted cash at beginning of period       $ 0       $ 0 0 0  
Cash, cash equivalents and restricted cash at end of period $ 0       $ 0       $ 0 $ 0 $ 0