Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities:
Net income	$ 35,909	$ 14,655
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization of deferred financing costs	167	131
Amortization of investment discount/premium	220	0
Depreciation and amortization	52,497	9,915
Deferred income taxes	9,909	(1,581)
Stock-based compensation	6,576	5,937
Impairment of intangible assets	0	6,185
Changes in assets and liabilities:
Tuition receivable, net	5,777	(2,916)
Other current assets	(1,304)	96
Other assets	64	(824)
Accounts payable and accrued expenses	229	1,363
Income taxes payable and income taxes receivable	(10,673)	(3,447)
Contract liabilities	4,778	2,768
Other long-term liabilities	(1,086)	(2,256)
Net cash provided by operating activities	103,063	30,026
Cash flows from investing activities:
Purchases of property and equipment	(18,859)	(8,596)
Purchases of marketable securities	(12,443)	0
Maturities of marketable securities	22,560	0
Other investments	(740)	0
Net cash used in investing activities	(9,482)	(8,596)
Cash flows from financing activities:
Common dividends paid	(22,194)	(5,778)
Taxes paid for stock awards	(7,607)	0
Net cash used in financing activities	(29,801)	(5,778)
Net increase in cash, cash equivalents, and restricted cash	63,780	15,652
Cash, cash equivalents, and restricted cash — beginning of period	312,237	156,448
Cash, cash equivalents, and restricted cash — end of period	376,017	172,100
Noncash transactions:
Purchases of property and equipment included in accounts payable	$ 840	$ 1,252