Subsequent Events - Narrative (Details)															1 Months Ended		2 Months Ended	3 Months Ended	9 Months Ended	12 Months Ended
	Mar. 01, 2016 USD ($) shares	Feb. 28, 2016 $ / shares	Feb. 11, 2016 USD ($) hotel extension	Feb. 01, 2016 USD ($)	Jan. 25, 2016 USD ($) hotel	Jan. 04, 2016 USD ($) shares	Dec. 29, 2015 USD ($) hotel	Dec. 02, 2015 USD ($)	Nov. 02, 2015 USD ($)	Oct. 15, 2015 USD ($)	Jun. 15, 2015 USD ($) closing_transaction hotel	Jun. 02, 2015 USD ($) closing_transaction hotel	Feb. 27, 2015 USD ($)	Feb. 03, 2014 $ / shares	Mar. 28, 2016 USD ($) $ / shares	Feb. 29, 2016 USD ($) shares	Feb. 29, 2016 USD ($)	Mar. 20, 2014 USD ($)	Dec. 31, 2014 USD ($) $ / shares	Dec. 31, 2015 USD ($) $ / shares	Jan. 07, 2014 $ / shares
Subsequent Event [Line Items]
Common stock issued through Distribution Reinvestment Plan																			$ 1,521,000	$ 18,158,000
Issuance of common stock																		$ 2,418,000	$ 248,715,000	$ 631,779,000
Common stock, par value (usd per share) | $ / shares																			$ 0.01	$ 0.01
Purchase price of acquisition										$ 52,137,000			$ 447,403,000
Acquisition deposits																			$ 75,000,000	$ 40,504,000
Dividends declared per share (in dollars per share) | $ / shares														$ 1.7
Share price (in dollars per share) | $ / shares																				$ 22.50
Secured Debt | SN Term Loan
Subsequent Event [Line Items]
Amount of loan										450,000,000.0										$ 450,000,000.0
Noble Portfolio
Subsequent Event [Line Items]
Number of properties expected to be acquired (hotel) | hotel											13
Number of closing transactions | closing_transaction											4
Purchase price of acquisition								$ 59,000,000	$ 48,600,000		$ 300,000,000
Noble Portfolio | Secured Debt | SN Term Loan
Subsequent Event [Line Items]
Proceeds from debt								$ 42,300,000	$ 26,000,000
Summit Portfolio
Subsequent Event [Line Items]
Number of properties expected to be acquired (hotel) | hotel												26
Number of closing transactions | closing_transaction												3
Purchase price of acquisition										150,100,000		$ 347,400,000
Number of properties no longer expected to be acquired | hotel							10
Escrow deposit forfeited							$ 9,100,000
Summit Portfolio | Secured Debt | SN Term Loan
Subsequent Event [Line Items]
Proceeds from debt										$ 96,900,000
Subsequent event
Subsequent Event [Line Items]
Common stock issued through Distribution Reinvestment Plan																	$ 22,400,000
Dividends paid	$ 4,900,000			$ 5,200,000		$ 5,200,000
Cash dividend	$ 2,700,000			$ 2,900,000		$ 2,800,000
Share reallocated under DRIP (in shares) | shares	94,009					103,071										100,754
Payments for purchase of shares under DRIP	$ 2,200,000					$ 2,500,000										$ 2,400,000
Additional shares authorized under DRIP (up to) | shares						3,656,000
Repurchase limit percent per fiscal semester		2.50%
Repurchase limit percent per fiscal year		5.00%
Dividends declared per share (in dollars per share) | $ / shares															$ 1.70
Share price (in dollars per share) | $ / shares															$ 23.75
Subsequent event | Advisor
Subsequent Event [Line Items]
Maximum monthly asset management fee payable															$ 500,000
Amended Advisory Agreement, amount to trigger termination clause (a)															500,000
Amended Advisory Agreement, amount to trigger termination clause (b)															50,000,000.0
Amended Advisory Agreement, amount to trigger termination clause (d), option one															500,000
Amended Advisory Agreement, amount to trigger termination clause (d), option two															$ 500,000
Notice prior to termination if the Trigger occurs prior to term expiration (days)															90 days
Notice prior to termination (days)															60 days
Subsequent event | Secured Debt | SN Term Loan
Subsequent Event [Line Items]
Amount of loan			$ 293,400,000.0
Subsequent event | Noble Portfolio
Subsequent Event [Line Items]
Number of properties no longer expected to be acquired | hotel					9
Escrow deposit forfeited					$ 22,000,000
Subsequent event | Summit Portfolio, Third Closing
Subsequent Event [Line Items]
Purchase price of acquisition			108,300,000
Decrease in previously paid earnest money deposit			18,500,000
Subsequent event | Summit Portfolio, Third Closing | Summit Loan
Subsequent Event [Line Items]
Proceeds from short-term debt			20,000,000
Subsequent event | Summit Portfolio, Third Closing | Secured Debt | SN Term Loan
Subsequent Event [Line Items]
Proceeds from debt			$ 70,400,000
Subsequent event | Summit Portfolio, Second Closing
Subsequent Event [Line Items]
Number of properties expected to be acquired (hotel) | hotel			10
Purchase price of acquisition			$ 89,100,000
Acquisition deposits			7,500,000
Common Stock
Subsequent Event [Line Items]
Common stock, par value (usd per share) | $ / shares																					$ 0.01
Share price (in dollars per share) | $ / shares																					$ 25.00
Common Stock | Subsequent event
Subsequent Event [Line Items]
Issuance of common stock																	$ 600,000
Loans Payable | Subsequent event | Summit Loan
Subsequent Event [Line Items]
Amount of loan			$ 27,500,000.0
Interest rate (percent)			13.00%
Interest rate, paid in cash (percent)			9.00%
Interest rate, compounded (percent)			4.00%
Number of extensions | extension			2
Extension term			1 year
Increase in interest rate per extension			1.00%
Periodic payment, principal			$ 1,000,000
Loans Payable | Subsequent event | Summit Portfolio | Summit Loan
Subsequent Event [Line Items]
Proceeds from short-term debt			20,000,000
Acquisition deposits			7,500,000
Secured Debt | Subsequent event | Summit Loan
Subsequent Event [Line Items]
Short-term debt outstanding			$ 5,000,000
Share Repurchase Program, Option One | Subsequent event
Subsequent Event [Line Items]
Repurchase price, estimated NAV per share, year one (in dollars per share) | $ / shares		$ 23.13
Repurchase price, percent of NAV per share, year one		92.50%
Repurchase price, estimated NAV per share, year two (in dollars per share) | $ / shares		$ 23.75
Repurchase price, percent of NAV per share, year two		95.00%
Repurchase price, estimated NAV per share, year three (in dollars per share) | $ / shares		$ 24.38
Repurchase price, percent of NAV per share, year three		97.50%
Repurchase price, estimated NAV per share, year four (in dollars per share) | $ / shares		$ 25.00
Repurchase price, percent of NAV per share, year four		100.00%
Share Repurchase Program, Option Two | Subsequent event
Subsequent Event [Line Items]
Repurchase price, percent of NAV per share, year one		92.50%
Repurchase price, percent of NAV per share, year two		95.00%
Repurchase price, percent of NAV per share, year three		97.50%
Repurchase price, percent of NAV per share, year four		100.00%