Organization and Summary of Significant Accounting Policies (Recent Accounting Pronouncements) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Restricted cash	$ 29,306		$ 22,298
Excess tax benefit from stock-based compensation		$ (55)
Retained earnings	203,841		194,729
Income Tax Expense (Benefit)	6,238	3,052
ASU cumulative adjustment to retained earnings			$ 1,273
Accounting Standards Update 2016-18 | Scenario, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Restricted cash	29,300	30,000
Increase to net cash flows from operating activities		3,100
Increase Decrease In Cash Flows From Investing Activities		1,300
Increase Decrease In Cash Flows From Financing Activities		$ 1,300
Accounting Standards Update 2016-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase to net cash flows from operating activities	100
Increase Decrease In Cash Flows From Financing Activities	100
Excess tax benefit from stock-based compensation	$ 25