Consolidated Statements Of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Revenues:
Rental income	$ 95,321	$ 88,120
Facility management fees	166	158
Total operating revenues	95,487	88,278
Expenses:
Cost of operations	33,444	29,384
Depreciation and amortization	28,441	26,961
General and administrative	2,487	2,399
Total operating expenses	64,372	58,744
Other income and (expenses):
Interest and other income	62	43
Interest and other expenses	(3,376)	(4,588)
Total other income and (expenses)	(3,314)	(4,545)
Net income	27,801	24,989
Net income allocable to noncontrolling interests:
Noncontrolling interests - common units	2,703	2,566
Total net income allocable to noncontrolling interests	2,703	2,566
Net income allocable to PS Business Parks, Inc.:
Preferred shareholders	15,122	13,850
Restricted stock unit holders	36	33
Common shareholders	9,940	8,540
Total net income allocable to PS Business Parks, Inc.	25,098	22,423
Net income	$ 27,801	$ 24,989
Net income per common share
Basic	$ 0.37	$ 0.35
Diluted	$ 0.37	$ 0.35
Weighted average common shares outstanding:
Basic	26,863	24,308
Diluted	26,961	24,411