Stock-Based Compensation Plans (Details 5) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended
Jun. 30, 2020	Jun. 30, 2019
Additional disclosures
Stock-based compensation expense	$ 11,624	$ 13,129
Capitalized stock-based compensation cost	$ 6,174	$ 5,374
Performance Shares
Additional disclosures
Grant date value (in dollars per share)	$ 225.59
Restricted stock and restricted stock units
Additional disclosures
Unrecognized compensation cost for unvested restricted stock	$ 39,406
Weighted average period for recognition of unrecognized compensation cost	2 years 1 month 6 days

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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